android_kernel_xiaomi_sm8350/drivers/ieee1394
Andrea Righi 27ac792ca0 PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures
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>
2008-07-24 10:47:21 -07:00
..
config_roms.c
config_roms.h
csr1212.c ieee1394: reduce log noise about config ROM CRC errors 2008-07-14 13:06:02 +02:00
csr1212.h
csr.c
csr.h
dma.c ieee1394: dump mmapped iso buffers in core files 2008-07-14 13:06:02 +02:00
dma.h
dv1394-private.h
dv1394.c device create: ieee1394: convert device_create to device_create_drvdata 2008-07-21 21:54:43 -07:00
dv1394.h
eth1394.c
eth1394.h
highlevel.c ieee1394: video1394: reorder module init, prepare BKL removal 2008-07-14 13:06:02 +02:00
highlevel.h ieee1394: video1394: reorder module init, prepare BKL removal 2008-07-14 13:06:02 +02:00
hosts.c
hosts.h
ieee1394_core.c
ieee1394_core.h
ieee1394_hotplug.h
ieee1394_transactions.c
ieee1394_transactions.h
ieee1394_types.h
ieee1394-ioctl.h
ieee1394.h
init_ohci1394_dma.c
iso.c PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
iso.h
Kconfig
Makefile
nodemgr.c Driver Core: add ability for class_find_device to start in middle of list 2008-07-21 21:54:47 -07:00
nodemgr.h
ohci1394.c
ohci1394.h
pcilynx.c
pcilynx.h
raw1394-private.h
raw1394.c device create: ieee1394: convert device_create to device_create_drvdata 2008-07-21 21:54:43 -07:00
raw1394.h
sbp2.c ieee1394: sbp2: spin disks down on suspend and shutdown 2008-07-14 13:00:18 +02:00
sbp2.h
video1394.c device create: ieee1394: convert device_create to device_create_drvdata 2008-07-21 21:54:43 -07:00
video1394.h