Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-14 08:02:07 +00:00
Code Issues Packages Projects Releases Wiki Activity
ceffacc1d6
linux/drivers/ieee1394
History
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 ieee1394: eth1394: don't autoload by hotplug when ohci1394 starts 2007-04-30 00:00:30 +02:00
config_roms.h ieee1394: eth1394: don't autoload by hotplug when ohci1394 starts 2007-04-30 00:00:30 +02:00
csr1212.c ieee1394: reduce log noise about config ROM CRC errors 2008-07-14 13:06:02 +02:00
csr1212.h ieee1394: csr1212: proper refcounting 2007-10-16 23:59:59 +02:00
csr.c ieee1394: be*_add_cpu conversion 2008-04-18 17:55:29 +02:00
csr.h
dma.c ieee1394: dump mmapped iso buffers in core files 2008-07-14 13:06:02 +02:00
dma.h ieee1394: move some comments from declaration to definition 2007-04-30 00:00:28 +02:00
dv1394-private.h [PATCH] ieee1394: dv1394: sem2mutex conversion 2006-07-03 12:02:32 -04:00
dv1394.c device create: ieee1394: convert device_create to device_create_drvdata 2008-07-21 21:54:43 -07:00
dv1394.h
eth1394.c ieee1394: eth1394: fix lock imbalance 2007-10-16 23:59:54 +02:00
eth1394.h ieee1394: eth1394: handle tlabel exhaustion 2007-05-27 23:20:59 +02:00
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 ieee1394: first minimal NUMA awareness 2007-07-10 00:07:40 +02:00
hosts.h ieee1394: remove old isochronous ABI 2007-07-10 00:07:41 +02:00
ieee1394_core.c ieee1394: limit early node speed to host interface speed 2008-04-18 17:55:31 +02:00
ieee1394_core.h ieee1394: remove old isochronous ABI 2007-07-10 00:07:41 +02:00
ieee1394_hotplug.h
ieee1394_transactions.c ieee1394: remove unused code 2008-01-30 22:22:20 +01:00
ieee1394_transactions.h ieee1394: remove old isochronous ABI 2007-07-10 00:07:41 +02:00
ieee1394_types.h ieee1394: safer definition of empty macros 2006-09-17 19:31:20 +02:00
ieee1394-ioctl.h ieee1394: cycle timer read extension for raw1394 2007-02-17 14:39:33 +01:00
ieee1394.h
init_ohci1394_dma.c x86: early boot debugging via FireWire (ohci1394_dma=early) 2008-01-30 13:34:11 +01:00
iso.c PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures 2008-07-24 10:47:21 -07:00
iso.h ieee1394: rawiso: requeue packet for transmission after skipped cycle 2008-04-25 18:15:45 +02:00
Kconfig ieee1394: Kconfig menu touch-up 2008-06-19 00:12:36 +02:00
Makefile x86: early boot debugging via FireWire (ohci1394_dma=early) 2008-01-30 13:34:11 +01:00
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 ieee1394: convert ieee1394 from "struct class_device" to "struct device" 2007-07-10 00:07:39 +02:00
ohci1394.c ieee1394: rawiso: requeue packet for transmission after skipped cycle 2008-04-25 18:15:45 +02:00
ohci1394.h ieee1394: remove old isochronous ABI 2007-07-10 00:07:41 +02:00
pcilynx.c ieee1394: Use shorter list_splice_init() for brevity. 2008-04-18 17:55:30 +02:00
pcilynx.h
raw1394-private.h ieee1394: remove old isochronous ABI 2007-07-10 00:07:41 +02:00
raw1394.c device create: ieee1394: convert device_create to device_create_drvdata 2008-07-21 21:54:43 -07:00
raw1394.h ieee1394: remove old isochronous ABI 2007-07-10 00:07:41 +02:00
sbp2.c ieee1394: sbp2: spin disks down on suspend and shutdown 2008-07-14 13:00:18 +02:00
sbp2.h ieee1394: sbp2: fix spindown for PL-3507 and TSB42AA9 firmwares 2008-07-14 13:00:18 +02:00
video1394.c device create: ieee1394: convert device_create to device_create_drvdata 2008-07-21 21:54:43 -07:00
video1394.h