![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
430 lines
12 KiB
C
430 lines
12 KiB
C
/*
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* Copyright IBM Corp. 2001, 2009
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* Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
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* Martin Schwidefsky <schwidefsky@de.ibm.com>,
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <asm/ebcdic.h>
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#include <asm/sysinfo.h>
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#include <asm/cpcmd.h>
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/* Sigh, math-emu. Don't ask. */
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#include <asm/sfp-util.h>
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#include <math-emu/soft-fp.h>
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#include <math-emu/single.h>
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static inline int stsi_0(void)
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{
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int rc = stsi(NULL, 0, 0, 0);
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return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
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}
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static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
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{
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if (stsi(info, 1, 1, 1) == -ENOSYS)
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return len;
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EBCASC(info->manufacturer, sizeof(info->manufacturer));
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EBCASC(info->type, sizeof(info->type));
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EBCASC(info->model, sizeof(info->model));
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EBCASC(info->sequence, sizeof(info->sequence));
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EBCASC(info->plant, sizeof(info->plant));
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EBCASC(info->model_capacity, sizeof(info->model_capacity));
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EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
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EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
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len += sprintf(page + len, "Manufacturer: %-16.16s\n",
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info->manufacturer);
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len += sprintf(page + len, "Type: %-4.4s\n",
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info->type);
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if (info->model[0] != '\0')
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/*
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* Sigh: the model field has been renamed with System z9
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* to model_capacity and a new model field has been added
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* after the plant field. To avoid confusing older programs
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* the "Model:" prints "model_capacity model" or just
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* "model_capacity" if the model string is empty .
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*/
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len += sprintf(page + len,
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"Model: %-16.16s %-16.16s\n",
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info->model_capacity, info->model);
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else
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len += sprintf(page + len, "Model: %-16.16s\n",
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info->model_capacity);
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len += sprintf(page + len, "Sequence Code: %-16.16s\n",
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info->sequence);
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len += sprintf(page + len, "Plant: %-4.4s\n",
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info->plant);
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len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n",
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info->model_capacity, *(u32 *) info->model_cap_rating);
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if (info->model_perm_cap[0] != '\0')
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len += sprintf(page + len,
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"Model Perm. Capacity: %-16.16s %08u\n",
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info->model_perm_cap,
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*(u32 *) info->model_perm_cap_rating);
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if (info->model_temp_cap[0] != '\0')
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len += sprintf(page + len,
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"Model Temp. Capacity: %-16.16s %08u\n",
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info->model_temp_cap,
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*(u32 *) info->model_temp_cap_rating);
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return len;
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}
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static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
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{
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struct sysinfo_1_2_2_extension *ext;
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int i;
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if (stsi(info, 1, 2, 2) == -ENOSYS)
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return len;
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ext = (struct sysinfo_1_2_2_extension *)
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((unsigned long) info + info->acc_offset);
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "CPUs Total: %d\n",
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info->cpus_total);
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len += sprintf(page + len, "CPUs Configured: %d\n",
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info->cpus_configured);
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len += sprintf(page + len, "CPUs Standby: %d\n",
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info->cpus_standby);
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len += sprintf(page + len, "CPUs Reserved: %d\n",
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info->cpus_reserved);
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if (info->format == 1) {
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/*
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* Sigh 2. According to the specification the alternate
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* capability field is a 32 bit floating point number
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* if the higher order 8 bits are not zero. Printing
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* a floating point number in the kernel is a no-no,
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* always print the number as 32 bit unsigned integer.
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* The user-space needs to know about the strange
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* encoding of the alternate cpu capability.
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*/
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len += sprintf(page + len, "Capability: %u %u\n",
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info->capability, ext->alt_capability);
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for (i = 2; i <= info->cpus_total; i++)
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len += sprintf(page + len,
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"Adjustment %02d-way: %u %u\n",
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i, info->adjustment[i-2],
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ext->alt_adjustment[i-2]);
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} else {
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len += sprintf(page + len, "Capability: %u\n",
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info->capability);
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for (i = 2; i <= info->cpus_total; i++)
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len += sprintf(page + len,
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"Adjustment %02d-way: %u\n",
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i, info->adjustment[i-2]);
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}
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if (info->secondary_capability != 0)
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len += sprintf(page + len, "Secondary Capability: %d\n",
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info->secondary_capability);
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return len;
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}
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static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
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{
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if (stsi(info, 2, 2, 2) == -ENOSYS)
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return len;
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EBCASC(info->name, sizeof(info->name));
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "LPAR Number: %d\n",
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info->lpar_number);
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len += sprintf(page + len, "LPAR Characteristics: ");
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if (info->characteristics & LPAR_CHAR_DEDICATED)
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len += sprintf(page + len, "Dedicated ");
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if (info->characteristics & LPAR_CHAR_SHARED)
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len += sprintf(page + len, "Shared ");
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if (info->characteristics & LPAR_CHAR_LIMITED)
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len += sprintf(page + len, "Limited ");
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "LPAR Name: %-8.8s\n",
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info->name);
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len += sprintf(page + len, "LPAR Adjustment: %d\n",
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info->caf);
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len += sprintf(page + len, "LPAR CPUs Total: %d\n",
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info->cpus_total);
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len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
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info->cpus_configured);
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len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
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info->cpus_standby);
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len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
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info->cpus_reserved);
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len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
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info->cpus_dedicated);
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len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
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info->cpus_shared);
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return len;
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}
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static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
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{
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int i;
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if (stsi(info, 3, 2, 2) == -ENOSYS)
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return len;
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for (i = 0; i < info->count; i++) {
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EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
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EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
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i, info->vm[i].name);
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len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
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i, info->vm[i].cpi);
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len += sprintf(page + len, "VM%02d Adjustment: %d\n",
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i, info->vm[i].caf);
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len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
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i, info->vm[i].cpus_total);
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len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
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i, info->vm[i].cpus_configured);
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len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
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i, info->vm[i].cpus_standby);
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len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
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i, info->vm[i].cpus_reserved);
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}
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return len;
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}
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static int proc_read_sysinfo(char *page, char **start,
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off_t off, int count,
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int *eof, void *data)
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{
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unsigned long info = get_zeroed_page(GFP_KERNEL);
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int level, len;
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if (!info)
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return 0;
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len = 0;
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level = stsi_0();
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if (level >= 1)
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len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
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if (level >= 1)
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len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
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if (level >= 2)
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len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
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if (level >= 3)
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len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
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free_page(info);
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return len;
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}
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static __init int create_proc_sysinfo(void)
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{
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create_proc_read_entry("sysinfo", 0444, NULL,
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proc_read_sysinfo, NULL);
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return 0;
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}
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device_initcall(create_proc_sysinfo);
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/*
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* Service levels interface.
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*/
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static DECLARE_RWSEM(service_level_sem);
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static LIST_HEAD(service_level_list);
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int register_service_level(struct service_level *slr)
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{
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struct service_level *ptr;
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down_write(&service_level_sem);
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list_for_each_entry(ptr, &service_level_list, list)
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if (ptr == slr) {
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up_write(&service_level_sem);
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return -EEXIST;
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}
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list_add_tail(&slr->list, &service_level_list);
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up_write(&service_level_sem);
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return 0;
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}
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EXPORT_SYMBOL(register_service_level);
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int unregister_service_level(struct service_level *slr)
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{
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struct service_level *ptr, *next;
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int rc = -ENOENT;
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down_write(&service_level_sem);
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list_for_each_entry_safe(ptr, next, &service_level_list, list) {
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if (ptr != slr)
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continue;
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list_del(&ptr->list);
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rc = 0;
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break;
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}
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up_write(&service_level_sem);
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return rc;
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}
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EXPORT_SYMBOL(unregister_service_level);
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static void *service_level_start(struct seq_file *m, loff_t *pos)
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{
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down_read(&service_level_sem);
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return seq_list_start(&service_level_list, *pos);
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}
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static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
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{
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return seq_list_next(p, &service_level_list, pos);
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}
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static void service_level_stop(struct seq_file *m, void *p)
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{
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up_read(&service_level_sem);
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}
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static int service_level_show(struct seq_file *m, void *p)
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{
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struct service_level *slr;
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slr = list_entry(p, struct service_level, list);
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slr->seq_print(m, slr);
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return 0;
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}
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static const struct seq_operations service_level_seq_ops = {
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.start = service_level_start,
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.next = service_level_next,
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.stop = service_level_stop,
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.show = service_level_show
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};
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static int service_level_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &service_level_seq_ops);
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}
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static const struct file_operations service_level_ops = {
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.open = service_level_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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};
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static void service_level_vm_print(struct seq_file *m,
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struct service_level *slr)
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{
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char *query_buffer, *str;
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query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
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if (!query_buffer)
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return;
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cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
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str = strchr(query_buffer, '\n');
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if (str)
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*str = 0;
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seq_printf(m, "VM: %s\n", query_buffer);
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kfree(query_buffer);
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}
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static struct service_level service_level_vm = {
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.seq_print = service_level_vm_print
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};
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static __init int create_proc_service_level(void)
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{
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proc_create("service_levels", 0, NULL, &service_level_ops);
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if (MACHINE_IS_VM)
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register_service_level(&service_level_vm);
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return 0;
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}
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subsys_initcall(create_proc_service_level);
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/*
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* Bogomips calculation based on cpu capability.
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*/
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int get_cpu_capability(unsigned int *capability)
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{
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struct sysinfo_1_2_2 *info;
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int rc;
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info = (void *) get_zeroed_page(GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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rc = stsi(info, 1, 2, 2);
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if (rc == -ENOSYS)
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goto out;
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rc = 0;
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*capability = info->capability;
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out:
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free_page((unsigned long) info);
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return rc;
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}
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/*
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* CPU capability might have changed. Therefore recalculate loops_per_jiffy.
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*/
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void s390_adjust_jiffies(void)
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{
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struct sysinfo_1_2_2 *info;
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const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
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FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
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FP_DECL_EX;
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unsigned int capability;
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info = (void *) get_zeroed_page(GFP_KERNEL);
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if (!info)
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return;
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if (stsi(info, 1, 2, 2) != -ENOSYS) {
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/*
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* Major sigh. The cpu capability encoding is "special".
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* If the first 9 bits of info->capability are 0 then it
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* is a 32 bit unsigned integer in the range 0 .. 2^23.
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* If the first 9 bits are != 0 then it is a 32 bit float.
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* In addition a lower value indicates a proportionally
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* higher cpu capacity. Bogomips are the other way round.
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* To get to a halfway suitable number we divide 1e7
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* by the cpu capability number. Yes, that means a floating
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* point division .. math-emu here we come :-)
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*/
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FP_UNPACK_SP(SA, &fmil);
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if ((info->capability >> 23) == 0)
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FP_FROM_INT_S(SB, info->capability, 32, int);
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else
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FP_UNPACK_SP(SB, &info->capability);
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FP_DIV_S(SR, SA, SB);
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FP_TO_INT_S(capability, SR, 32, 0);
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} else
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/*
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* Really old machine without stsi block for basic
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* cpu information. Report 42.0 bogomips.
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*/
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capability = 42;
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loops_per_jiffy = capability * (500000/HZ);
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free_page((unsigned long) info);
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}
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/*
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* calibrate the delay loop
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*/
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void __cpuinit calibrate_delay(void)
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{
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s390_adjust_jiffies();
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/* Print the good old Bogomips line .. */
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printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
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"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
|
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(loops_per_jiffy/(5000/HZ)) % 100);
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}
|