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[PATCH] LOG2: Alter roundup_pow_of_two() so that it can use a ilog2() on a constant

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Alter roundup_pow_of_two() so that it can make use of ilog2() on a constant to
produce a constant value, retaining the ability for an arch to override it in
the non-const case.

This permits the function to be used to initialise variables.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David Howells 2006-12-08 02:37:51 -08:00 • committed by Linus Torvalds
parent f0d1b0b30d
commit 312a0c1709
2 changed files with 26 additions and 6 deletions
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6
include/linux/kernel.h
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@ -158,12 +158,6 @@ static inline int printk(const char *s, ...) { return 0; }
unsigned long int_sqrt(unsigned long);
static inline unsigned long
__attribute_const__ roundup_pow_of_two(unsigned long x)
{
return 1UL << fls_long(x - 1);
}
extern int printk_ratelimit(void);
extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst);
extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,