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sys_swapon: do only cleanup in the cleanup blocks

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The only way error is 0 in the cleanup blocks is when the function is
returning successfully. In this case, the cleanup blocks were setting
S_SWAPFILE in the S_ISREG case. But this is not a cleanup.

Move the setting of S_SWAPFILE to just before the "goto out;" to make
this more clear. At this point, we do not need to test for inode because
it will never be NULL.

Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Tested-by: Eric B Munson <emunson@mgebm.net>
Acked-by: Eric B Munson <emunson@mgebm.net>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cesar Eduardo Barros 2011-03-22 16:33:24 -07:00 committed by Linus Torvalds
parent f2090d2df5
commit 9b01c350af
1 changed files with 3 additions and 4 deletions
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7
mm/swapfile.c
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@ -2136,6 +2136,8 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
atomic_inc(&proc_poll_event);
wake_up_interruptible(&proc_poll_wait);
if (S_ISREG(inode->i_mode))
inode->i_flags |= S_SWAPFILE;
error = 0;
goto out;
bad_swap:
@ -2163,11 +2165,8 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
}
if (name)
putname(name);
if (inode && S_ISREG(inode->i_mode)) {
if (!error)
inode->i_flags |= S_SWAPFILE;
if (inode && S_ISREG(inode->i_mode))
mutex_unlock(&inode->i_mutex);
}
return error;
}