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authorJulia Lawall <julia@diku.dk>2008-04-29 00:59:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-29 08:06:04 -0700
commit3a8ca95e9d62980fd3b41165ec05032c63ce21da (patch)
tree885545c795b9bc2c8a542dd78455c178357c7a6c /scripts/Lindent
parent95d8c365b2df2adb904963333a93b15414403ed1 (diff)
drivers/misc: elide a non-zero test on a result that is never 0
The function thermal_cooling_device_register always returns either a valid pointer or a value made with ERR_PTR, so a test for non-zero on the result will always succeed. The problem was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) //<smpl> @a@ expression E, E1; statement S,S1; position p; @@ E = thermal_cooling_device_register(...) ... when != E = E1 if@p (E) S else S1 @n@ position a.p; expression E,E1; statement S,S1; @@ E = NULL ... when != E = E1 if@p (E) S else S1 @depends on !n@ expression E; statement S,S1; position a.p; @@ * if@p (E) S else S1 //</smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Thomas Sujith <sujith.thomas@intel.com> Cc: Len Brown <len.brown@intel.com> Cc: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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