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[-next] powerpc/mm: drop test in pp_601

Message ID 1544165056-52579-1-git-send-email-yuehaibing@huawei.com
State New
Headers show
Series [-next] powerpc/mm: drop test in pp_601 | expand

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snowpatch_ozlabs/build-pmac32 success build succeded & removed 0 sparse warning(s)
snowpatch_ozlabs/build-ppc64e success build succeded & removed 0 sparse warning(s)
snowpatch_ozlabs/build-ppc64be success build succeded & removed 0 sparse warning(s)
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Commit Message

YueHaibing Dec. 7, 2018, 6:44 a.m. UTC
The test selects between two identical values, so it doesn't look useful.
It turns out that the tested expression can only be true anyway, so drop
the test, the corresponding parameter, and the corresponding argument at
the only call site.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e,e1;
@@

* e ? e1 : e1
// </smpl>

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 arch/powerpc/mm/dump_bats.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/arch/powerpc/mm/dump_bats.c b/arch/powerpc/mm/dump_bats.c
index a0d23e9..33450a8 100644
--- a/arch/powerpc/mm/dump_bats.c
+++ b/arch/powerpc/mm/dump_bats.c
@@ -17,8 +17,8 @@  static char *pp_601(int k, int pp)
 	if (pp == 1)
 		return k ? "ROX" : "RWX";
 	if (pp == 2)
-		return k ? "RWX" : "RWX";
-	return k ? "ROX" : "ROX";
+		return "RWX";
+	return "ROX";
 }
 
 static void bat_show_601(struct seq_file *m, int idx, u32 lower, u32 upper)