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mm: try both endianess when checking for endianess 

When checking for the swap header try byteswapping the endianess dependent
fields to allow the swap partition to be shared between big & little endian
systems.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Chris Dearman 2008-04-28 02:12:19 -07:00 committed by Linus Torvalds
parent 19770b3260
commit 797df57490
1 changed files with 8 additions and 0 deletions
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8
mm/swapfile.c
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@ -1582,6 +1582,14 @@ asmlinkage long sys_swapon(const char __user * specialfile, int swap_flags)
error = -EINVAL;
goto bad_swap;
case 2:
/* swap partition endianess hack... */
if (swab32(swap_header->info.version) == 1) {
swab32s(&swap_header->info.version);
swab32s(&swap_header->info.last_page);
swab32s(&swap_header->info.nr_badpages);
for (i = 0; i < swap_header->info.nr_badpages; i++)
swab32s(&swap_header->info.badpages[i]);
}
/* Check the swap header's sub-version and the size of
the swap file and bad block lists */
if (swap_header->info.version != 1) {