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bitmap: optimise bitmap_set and bitmap_clear of a single bit

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We have eight users calling bitmap_clear for a single bit and seventeen
calling bitmap_set for a single bit.  Rather than fix all of them to
call __clear_bit or __set_bit, turn bitmap_clear and bitmap_set into
inline functions and make this special case efficient.

Link: http://lkml.kernel.org/r/20170628153221.11322-3-willy@infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2017-07-10 15:51:29 -07:00 • committed by Linus Torvalds
parent 3cc78125a0
commit e5af323c9b
3 changed files with 24 additions and 10 deletions
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3
lib/test_bitmap.c
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@ -333,9 +333,6 @@ static void __init test_bitmap_u32_array_conversions(void)
}
}
#define __bitmap_set(a, b, c) bitmap_set(a, b, c)
#define __bitmap_clear(a, b, c) bitmap_clear(a, b, c)
static void noinline __init test_mem_optimisations(void)
{
DECLARE_BITMAP(bmap1, 1024);