![]() On 32-bit architectures PAGE_ALIGN() truncates 64-bit values to the 32-bit boundary. For example: u64 val = PAGE_ALIGN(size); always returns a value < 4GB even if size is greater than 4GB. The problem resides in PAGE_MASK definition (from include/asm-x86/page.h for example): #define PAGE_SHIFT 12 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) ... #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) The "~" is performed on a 32-bit value, so everything in "and" with PAGE_MASK greater than 4GB will be truncated to the 32-bit boundary. Using the ALIGN() macro seems to be the right way, because it uses typeof(addr) for the mask. Also move the PAGE_ALIGN() definitions out of include/asm-*/page.h in include/linux/mm.h. See also lkml discussion: http://lkml.org/lkml/2008/6/11/237 [akpm@linux-foundation.org: fix drivers/media/video/uvc/uvc_queue.c] [akpm@linux-foundation.org: fix v850] [akpm@linux-foundation.org: fix powerpc] [akpm@linux-foundation.org: fix arm] [akpm@linux-foundation.org: fix mips] [akpm@linux-foundation.org: fix drivers/media/video/pvrusb2/pvrusb2-dvb.c] [akpm@linux-foundation.org: fix drivers/mtd/maps/uclinux.c] [akpm@linux-foundation.org: fix powerpc] Signed-off-by: Andrea Righi <righi.andrea@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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.. | ||
config_roms.c | ||
config_roms.h | ||
csr.c | ||
csr.h | ||
csr1212.c | ||
csr1212.h | ||
dma.c | ||
dma.h | ||
dv1394-private.h | ||
dv1394.c | ||
dv1394.h | ||
eth1394.c | ||
eth1394.h | ||
highlevel.c | ||
highlevel.h | ||
hosts.c | ||
hosts.h | ||
ieee1394-ioctl.h | ||
ieee1394.h | ||
ieee1394_core.c | ||
ieee1394_core.h | ||
ieee1394_hotplug.h | ||
ieee1394_transactions.c | ||
ieee1394_transactions.h | ||
ieee1394_types.h | ||
init_ohci1394_dma.c | ||
iso.c | ||
iso.h | ||
Kconfig | ||
Makefile | ||
nodemgr.c | ||
nodemgr.h | ||
ohci1394.c | ||
ohci1394.h | ||
pcilynx.c | ||
pcilynx.h | ||
raw1394-private.h | ||
raw1394.c | ||
raw1394.h | ||
sbp2.c | ||
sbp2.h | ||
video1394.c | ||
video1394.h |