The patch titled
Fix roundup_pow_of_two(1)
has been added to the -mm tree. Its filename is
fix-roundup_pow_of_two1.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Fix roundup_pow_of_two(1)
From: Rolf Eike Beer <eike-kernel@xxxxxxxxx>
Fix roundup_pow_of_two(1)
1 is a power of two, therefore roundup_pow_of_two(1) should return 1. It
does in case the argument is a variable but in case it's a constant it
behaves wrong and returns 0. Probably nobody ever did it so this was never
noticed.
Signed-off-by: Rolf Eike Beer <eike-kernel@xxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/log2.h | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN include/linux/log2.h~fix-roundup_pow_of_two1 include/linux/log2.h
--- a/include/linux/log2.h~fix-roundup_pow_of_two1
+++ a/include/linux/log2.h
@@ -159,7 +159,7 @@ unsigned long __roundup_pow_of_two(unsig
#define roundup_pow_of_two(n) \
( \
__builtin_constant_p(n) ? ( \
- (n == 1) ? 0 : \
+ (n == 1) ? 1 : \
(1UL << (ilog2((n) - 1) + 1)) \
) : \
__roundup_pow_of_two(n) \
_
Patches currently in -mm which might be from eike-kernel@xxxxxxxxx are
mm-use-div_round_up-in-mm-memoryc.patch
fix-roundup_pow_of_two1.patch
-
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