From: Ralf Baechle <ralf@linux-mips.org>
To: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Cc: Chris Dearman <chris@mips.com>, linux-mips@linux-mips.org
Subject: [PATCH] Try both endianess when checking for endianess.
Date: Mon, 25 Feb 2008 19:26:48 +0000 [thread overview]
Message-ID: <20080225192648.GA14357@linux-mips.org> (raw)
From: Chris Dearman <chris@mips.com>
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>
mm/swapfile.c | 8 ++++++++
1 file changed, 8 insertions(+)
Index: linux-queue/mm/swapfile.c
===================================================================
--- linux-queue.orig/mm/swapfile.c
+++ linux-queue/mm/swapfile.c
@@ -1551,6 +1551,14 @@ asmlinkage long sys_swapon(const char __
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) {
reply other threads:[~2008-02-25 19:27 UTC|newest]
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