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
..
m32104ut
m32700ut
mappi2
mappi3
opsput
a.out.h	aout: move STACK_TOP[_MAX] to asm/processor.h	2008-02-08 09:22:29 -08:00
addrspace.h
assembler.h
atomic.h
auxvec.h
bitops.h
bug.h
bugs.h
byteorder.h
cache.h
cachectl.h
cacheflush.h
checksum.h
cputime.h
current.h
delay.h
device.h
div64.h
dma.h
elf.h
emergency-restart.h
errno.h
fb.h
fcntl.h
flat.h
futex.h
hardirq.h
hw_irq.h
ide.h	ide: remove ide_init_default_irq() macro	2008-04-18 00:46:35 +02:00
io.h
ioctl.h
ioctls.h
ipcbuf.h
irq_regs.h
irq.h
Kbuild
kdebug.h
kmap_types.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
m32r_mp_fpga.h
m32r.h
m32102.h
mc146818rtc.h
mman.h
mmu_context.h
mmu.h
mmzone.h
module.h
msgbuf.h
mutex.h
namei.h
page.h	PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures	2008-07-24 10:47:21 -07:00
param.h	avoid overflows in kernel/time.c	2008-02-08 09:22:39 -08:00
pci.h
percpu.h
pgalloc.h	CONFIG_HIGHPTE vs. sub-page page tables.	2008-02-08 09:22:42 -08:00
pgtable-2level.h
pgtable.h	mm: introduce pte_special pte bit	2008-04-28 08:58:23 -07:00
poll.h
posix_types.h	asm-*/posix_types.h: scrub __GLIBC__	2008-02-08 09:22:34 -08:00
processor.h	aout: move STACK_TOP[_MAX] to asm/processor.h	2008-02-08 09:22:29 -08:00
ptrace.h
resource.h
rtc.h
s1d13806.h
scatterlist.h
sections.h
segment.h
semaphore.h	Generic semaphore implementation	2008-04-17 10:42:34 -04:00
sembuf.h
serial.h
setup.h
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h
smp.h	m32r: convert to generic helpers for IPI function calls	2008-06-26 11:22:57 +02:00
socket.h
sockios.h
spinlock_types.h
spinlock.h
stat.h
statfs.h
string.h
syscall.h
system.h
termbits.h
termios.h
thread_info.h
timex.h
tlb.h
tlbflush.h
topology.h
types.h	m32r: types: use <asm-generic/int-*.h> for the m32r architecture	2008-05-02 16:18:21 -07:00
uaccess.h	asm-m32r/uaccess.h must #include <asm/setup.h>	2008-06-06 11:29:13 -07:00
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