From a0f7bfd3429fc48f4d1aa5364b9428d75798ba04 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Mon, 27 Jul 2009 18:15:25 +0200 Subject: [PATCH] fs/xfs: Correct redundant test bp was tested for NULL a few lines before, followed by a return, and there is no intervening modification of its value. A simplified version of the semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @r exists@ local idexpression x; expression E; position p1,p2; @@ if (x == NULL || ...) { ... when forall return ...; } ... when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\) ( *x == NULL | *x != NULL ) // Signed-off-by: Julia Lawall Acked-by: Felix Blyakher Signed-off-by: Felix Blyakher --- fs/xfs/xfs_trans_buf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c index 8ee2f8c8b0a6..218829e6a152 100644 --- a/fs/xfs/xfs_trans_buf.c +++ b/fs/xfs/xfs_trans_buf.c @@ -307,7 +307,7 @@ xfs_trans_read_buf( return (flags & XFS_BUF_TRYLOCK) ? EAGAIN : XFS_ERROR(ENOMEM); - if ((bp != NULL) && (XFS_BUF_GETERROR(bp) != 0)) { + if (XFS_BUF_GETERROR(bp) != 0) { xfs_ioerror_alert("xfs_trans_read_buf", mp, bp, blkno); error = XFS_BUF_GETERROR(bp); @@ -315,7 +315,7 @@ xfs_trans_read_buf( return error; } #ifdef DEBUG - if (xfs_do_error && (bp != NULL)) { + if (xfs_do_error) { if (xfs_error_target == target) { if (((xfs_req_num++) % xfs_error_mod) == 0) { xfs_buf_relse(bp);