linux-mips
[Top] [All Lists]

[PATCH] Try both endianess when checking for endianess.

To: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: [PATCH] Try both endianess when checking for endianess.
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 25 Feb 2008 19:26:48 +0000
Cc: Chris Dearman <chris@mips.com>, linux-mips@linux-mips.org
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.17 (2007-11-01)
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) {

<Prev in Thread] Current Thread [Next in Thread>
  • [PATCH] Try both endianess when checking for endianess., Ralf Baechle <=