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
..
proc-mn103e010
unit-asb2303
unit-asb2305
.gitignore
atomic.h
auxvec.h
bitops.h
bug.h
bugs.h
busctl-regs.h
byteorder.h
cache.h
cacheflush.h
checksum.h
cpu-regs.h
cputime.h
current.h
delay.h
device.h
div64.h	rename div64_64 to div64_u64	2008-05-01 08:03:58 -07:00
dma-mapping.h
dma.h
dmactl-regs.h
elf.h
emergency-restart.h
errno.h
exceptions.h
fb.h
fcntl.h
fpu.h
frame.inc
futex.h
gdb-stub.h
hardirq.h
highmem.h
hw_irq.h
ide.h
intctl-regs.h
io.h
ioctl.h
ioctls.h
ipc.h
ipcbuf.h	MN10300: Fix typo in header guard	2008-05-28 07:59:06 -07:00
irq_regs.h
irq.h
Kbuild	Really unexport asm/page.h	2008-03-06 08:13:47 -08:00
kdebug.h
kmap_types.h
kprobes.h
kvm.h	kvm: provide kvm.h for all architecture: fixes headers_install	2008-04-02 15:28:18 -07:00
linkage.h
local.h
mc146818rtc.h
mman.h
mmu_context.h
mmu.h
module.h
msgbuf.h
mutex.h
namei.h
nmi.h
page_offset.h
page.h	PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures	2008-07-24 10:47:21 -07:00
param.h	MN10300: define HZ as a config option	2008-02-23 17:12:13 -08:00
pci.h
percpu.h
pgalloc.h
pgtable.h	mm: introduce pte_special pte bit	2008-04-28 08:58:23 -07:00
pio-regs.h
poll.h
posix_types.h
processor.h	MN10300: Make cpu_relax() invoke barrier()	2008-05-08 10:49:39 -07:00
ptrace.h
reset-regs.h
resource.h
rtc-regs.h
rtc.h
scatterlist.h
sections.h
semaphore.h	Generic semaphore implementation	2008-04-17 10:42:34 -04:00
sembuf.h
serial-regs.h
serial.h
setup.h
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h
smp.h
socket.h	MN10300: define SO_MARK	2008-02-23 17:12:13 -08:00
sockios.h
spinlock.h
stat.h
statfs.h
string.h
system.h
termbits.h
termios.h
thread_info.h
timer-regs.h
timex.h
tlb.h
tlbflush.h
topology.h
types.h	mn10300: types: use <asm-generic/int-*.h> for the mn10300 architecture	2008-05-02 16:18:31 -07:00
uaccess.h
ucontext.h
unaligned.h	kernel: Move arches to use common unaligned access	2008-04-29 08:06:27 -07:00
unistd.h
user.h
vga.h
xor.h