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linux-2.6/arch/powerpc/kernel
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David Gibson eb6de28637 [POWERPC] Allow duplicate lmb_reserve() calls 
At present calling lmb_reserve() (and hence lmb_add_region()) twice
for exactly the same memory region will cause strange behaviour.

This makes life difficult when booting from a flat device tree with
memory reserve map.  Which regions are automatically reserved by the
kernel has changed over time, so it's quite possible a newer kernel
could attempt to auto-reserve a region which is also explicitly listed
in the device tree's reserve map, leading to trouble.

This patch avoids the problem by making lmb_reserve() ignore a call to
reserve a previously reserved region.  It also removes a now redundant
test designed to avoid one specific case of the problem noted above.

At present, this patch deals only with duplicate reservations of an
identical region.  Attempting to reserve two different, but
overlapping regions will still cause problems.  I might post another
patch later dealing with this case, but I'm avoiding it now since it
is substantially more complicated to deal with, less likely to occur
and more likely to indicate a genuine bug elsewhere if it does occur.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
 		2007-03-08 15:43:28 +11:00
..
vdso32 [POWERPC] Support feature fixups in vdso's 2006-10-25 11:54:07 +10:00
vdso64 [POWERPC] Cell timebase bug workaround 2006-10-25 11:54:18 +10:00
Makefile [POWERPC] pasemi: Idle loops 2007-02-07 14:03:22 +11:00
align.c [PATCH] powerpc: Implement support for setting little-endian mode via prctl 2006-06-09 21:24:15 +10:00
asm-offsets.c [POWERPC] Fix manual assembly WARN_ON() in enter_rtas(). 2007-01-09 17:03:02 +11:00
audit.c [PATCH] audit: AUDIT_PERM support 2006-09-11 13:32:30 -04:00
binfmt_elf32.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
btext.c [POWERPC] Use udbg_early_init() on ppc32 2007-02-14 11:55:16 +11:00
compat_audit.c [PATCH] audit: AUDIT_PERM support 2006-09-11 13:32:30 -04:00
cpu_setup_6xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
cpu_setup_pa6t.S [POWERPC] pasemi: Idle loops 2007-02-07 14:03:22 +11:00
cpu_setup_ppc970.S [POWERPC] powerpc: Enable DEEPNAP power savings mode on 970MP 2006-10-16 16:32:25 +10:00
cputable.c [POWERPC] No DEEPNAP on 970MP 1.0 2007-03-08 04:09:32 +11:00
crash.c [PATCH] Kexec / Kdump: Unify elf note code 2006-12-07 08:39:46 -08:00
crash_dump.c [POWERPC] Make doc comments extractable 2006-08-08 17:07:04 +10:00
dma_64.c [POWERPC] Make direct DMA use node local allocations 2006-12-04 20:38:59 +11:00
entry_32.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
entry_64.S [POWERPC] Clear RI bit in MSR before restoring r13 when returning to userspace 2007-02-07 14:03:23 +11:00
firmware.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
fpu.S [POWERPC] Restore copyright notice in arch/powerpc/kernel/fpu.S 2006-08-30 14:45:35 +10:00
head_4xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head_8xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head_32.S [POWERPC] Remove the broken Gemini support 2007-01-24 21:13:58 +11:00
head_44x.S [POWERPC] Remove ibm4{xx,4x}.h from arch/powerpc 2007-02-13 14:59:52 +11:00
head_64.S [POWERPC] Fix performance monitor exception 2007-02-07 14:03:23 +11:00
head_booke.h [PATCH] powerpc: Fix Kernel FP unavail exception for BookE 2006-02-10 16:51:50 +11:00
head_fsl_booke.S [POWERPC] 85xx: Drop use of SYNC macro in head_fsl_booke.S 2007-02-13 16:13:27 -06:00
ibmebus.c [POWERPC] Replace kmalloc+memset with kzalloc 2006-12-04 20:42:09 +11:00
idle.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
idle_6xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
idle_power4.S [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
io.c [POWERPC] Merge 32 and 64 bits asm-powerpc/io.h 2006-12-04 20:39:05 +11:00
iomap.c [POWERPC] Remove fastcall function attribute 2007-01-26 01:52:27 -06:00
iommu.c [POWERPC] Refactor 64 bits DMA operations 2006-12-04 20:38:40 +11:00
irq.c [PATCH] msi: sanely support hardware level msi disabling 2007-03-05 07:57:50 -08:00
kprobes.c [POWERPC] Added kprobes support to ppc32 2007-02-06 22:55:19 -06:00
l2cr_6xx.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
legacy_serial.c [POWERPC] Open Firmware serial port driver 2007-02-14 11:50:04 +11:00
lparcfg.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
lparmap.c [PATCH] powerpc: Fix iSeries bug in VMALLOCBASE/VMALLOC_START consolidation 2006-01-09 15:06:06 +11:00
machine_kexec.c [POWERPC] Move some kexec logic into machine_kexec.c 2006-08-17 16:41:10 +10:00
machine_kexec_32.c Storage class should be first 2006-06-26 18:57:34 +02:00
machine_kexec_64.c Merge branch 'merge' 2006-08-25 14:56:07 +10:00
misc.S [POWERPC] convert string i/o operations to C 2006-09-20 14:06:18 +10:00
misc_32.S [POWERPC] Consolidate feature fixup code 2006-10-25 11:42:10 +10:00
misc_64.S [POWERPC] pasemi: UART udbg support 2007-02-07 14:03:22 +11:00
module_32.c [POWERPC] Add support for R_PPC_ADDR16_HI relocations 2007-01-24 21:13:58 +11:00
module_64.c [POWERPC] Generic BUG for powerpc 2006-12-11 16:35:07 +11:00
nvram_64.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
of_device.c [POWERPC] of_device_register: propagate device_create_file return code 2006-12-08 02:23:07 -06:00
of_platform.c [POWERPC] powerpc: add scanning of ebc bus to of_platform 2006-12-19 15:35:40 +01:00
paca.c [POWERPC] Implement SLB shadow buffer 2006-08-08 17:08:56 +10:00
pci_32.c [POWERPC] Do not write virq back to PCI config space 2007-01-24 21:13:57 +11:00
pci_64.c Merge master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc 2007-02-08 10:04:20 -08:00
pci_dn.c [POWERPC] Constify & voidify get_property() 2006-07-31 15:55:04 +10:00
pmc.c [POWERPC] PA6T PMC support 2007-02-07 14:03:19 +11:00
ppc32.h powerpc: move include/asm-ppc64/ppc32.h to arch/powerpc/kernel 2005-11-03 16:03:28 +11:00
ppc_ksyms.c [POWERPC] Compile fixes for arch/powerpc dcr code 2007-02-07 14:03:23 +11:00
proc_ppc64.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
process.c [POWERPC] Harden validate_sp against stack corruption 2007-03-08 15:31:43 +11:00
prom.c [POWERPC] Allow duplicate lmb_reserve() calls 2007-03-08 15:43:28 +11:00
prom_init.c [POWERPC] Add device tree fixups for the EFIKA 2007-02-13 15:35:53 +11:00
prom_parse.c [POWERPC] Fix warning in prom_parse.c of_irq_map_oldworld() 2007-03-08 04:09:33 +11:00
ptrace-common.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ptrace.c [POWERPC] Mask 32-bit system call arguments to 32 bits on PPC64 in audit code 2007-01-24 21:13:58 +11:00
ptrace32.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
rtas-proc.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
rtas-rtc.c [PATCH] powerpc: reorg RTAS delay code 2006-06-09 21:21:06 +10:00
rtas.c Storage class should be before const qualifier 2007-02-17 20:11:19 +01:00
rtas_flash.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
rtas_pci.c [POWERPC] Merge 32 and 64 bits asm-powerpc/io.h 2006-12-04 20:39:05 +11:00
semaphore.c powerpc: Merge enough to start building in arch/powerpc. 2005-09-26 16:04:21 +10:00
setup-common.c [POWERPC] Fix xmon=off and cleanup xmon initialisation 2006-10-04 14:52:22 +10:00
setup.h [PATCH] powerpc: Make early xmon logic immune to location of early parsing 2006-05-19 15:02:12 +10:00
setup_32.c [POWERPC] Use udbg_early_init() on ppc32 2007-02-14 11:55:16 +11:00
setup_64.c [POWERPC] Distinguish POWER6 partition modes and tell userspace 2006-12-04 20:40:16 +11:00
signal_32.c [POWERPC] Fix register save area alignment for swapcontext syscall 2006-12-20 16:37:49 +11:00
signal_64.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
smp-tbsync.c [POWERPC] Replace kmalloc+memset with kzalloc 2006-12-04 20:42:09 +11:00
smp.c [POWERPC] Move MPIC smp routines into mpic.c 2007-02-14 11:50:04 +11:00
swsusp_32.S [PATCH] Change the name of pagedir_nosave 2006-09-26 08:49:01 -07:00
sys_ppc32.c [PATCH] Common compat_sys_sysinfo 2007-02-11 10:51:32 -08:00
syscalls.c [PATCH] namespaces: utsname: switch to using uts namespaces 2006-10-02 07:57:21 -07:00
sysfs.c [POWERPC] PA6T PMC support 2007-02-07 14:03:19 +11:00
systbl.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tau_6xx.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
time.c [POWERPC] iSeries: fix time.c for combined build 2006-12-04 20:39:15 +11:00
traps.c backlight: Separate backlight properties from backlight ops pointers 2007-02-20 09:26:53 +00:00
udbg.c [POWERPC] Use udbg_early_init() on ppc32 2007-02-14 11:55:16 +11:00
udbg_16550.c [POWERPC] pasemi: UART udbg support 2007-02-07 14:03:22 +11:00
vdso.c [POWERPC] Fix vDSO page count calculation 2007-02-13 15:35:52 +11:00
vecemu.c [PATCH] powerpc: Move arch/ppc*/kernel/vecemu.c to arch/powerpc 2005-09-21 19:21:07 +10:00
vector.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
vio.c [POWERPC] arch/powerpc/kernel/vio.c of_node_put cleanup 2007-01-24 21:13:57 +11:00
vmlinux.lds.S [PATCH] disable init/initramfs.c: architectures 2007-02-11 10:51:25 -08:00