AcoSail/kernel_optimize_test
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remove useless mnt_want_write call in xfs_write

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When mnt_want_write was introduced a call to it was added around
xfs_ichgtime, but there is no need for this because a file can't be open
read/write on a r/o mount, and a mount can't degrade r/o while we still
have files open for writing.  As the mnt_want_write changes were never
merged into the CVS tree this patch is for mainline only.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
This commit is contained in:
Christoph Hellwig 2008-12-03 12:20:22 +01:00 committed by Niv Sardi
parent ddcd856d81
commit 2234d54d3d
1 changed files with 1 additions and 9 deletions
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10
fs/xfs/linux-2.6/xfs_lrw.c
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@ -51,7 +51,6 @@
#include "xfs_vnodeops.h"
#include <linux/capability.h>
#include <linux/mount.h>
#include <linux/writeback.h>
@ -668,15 +667,8 @@ xfs_write(
if (new_size > xip->i_size)
xip->i_new_size = new_size;
/*
* We're not supposed to change timestamps in readonly-mounted
* filesystems. Throw it away if anyone asks us.
*/
if (likely(!(ioflags & IO_INVIS) &&
!mnt_want_write(file->f_path.mnt))) {
if (likely(!(ioflags & IO_INVIS)))
xfs_ichgtime(xip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
mnt_drop_write(file->f_path.mnt);
}
/*
* If the offset is beyond the size of the file, we have a couple