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[PATCH] powerpc: Fix mmap returning 64 bit addresses

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The merge of syscalls.c & sys_ppc32.c (30286ef6e0)
broke mmap, if the mmap returned a 64 bit address.

do_mmap2 was taking the return value from do_mmap_pgoff (an unsigned long), and
storing it in an int, before returning it to sys_mmap as an unsigned long. So
we were losing the high bits of the address.

You would have thought the compiler could catch this for us ...

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman 2005-10-21 16:01:34 +10:00 committed by Paul Mackerras
parent 90eac727c6
commit 05d84681ab
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/syscalls.c
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@ -162,7 +162,7 @@ static inline unsigned long do_mmap2(unsigned long addr, size_t len,
unsigned long fd, unsigned long off, int shift) unsigned long fd, unsigned long off, int shift)
{ {
struct file * file = NULL; struct file * file = NULL;
int ret = -EINVAL; unsigned long ret = -EINVAL;
if (shift) { if (shift) {
if (off & ((1 << shift) - 1)) if (off & ((1 << shift) - 1))