lkml.org 
[lkml]   [2015]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 3/3] linux/bitmap: Replace find_fisrt_{zero_}bit with the new lightweight api
Date
This is to replace find_fisrt_{zero_}bit with the new lightweight api 
all_bit_is_{one,zero} in bitmap_{full,empty}

Signed-off-by: Jia He <hejianet@gmail.com>
---
include/linux/bitmap.h | 4 ++--
include/linux/bitops.h | 3 +++
2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 15524f6..8877a68 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -281,7 +281,7 @@ static inline int bitmap_empty(const unsigned long *src, unsigned nbits)
if (small_const_nbits(nbits))
return ! (*src & BITMAP_LAST_WORD_MASK(nbits));

- return find_first_bit(src, nbits) == nbits;
+ return all_bit_is_zero(src, nbits);
}

static inline int bitmap_full(const unsigned long *src, unsigned int nbits)
@@ -289,7 +289,7 @@ static inline int bitmap_full(const unsigned long *src, unsigned int nbits)
if (small_const_nbits(nbits))
return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits));

- return find_first_zero_bit(src, nbits) == nbits;
+ return all_bit_is_one(src, nbits);
}

static __always_inline int bitmap_weight(const unsigned long *src, unsigned int nbits)
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index b881028..e34f2ff 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -214,6 +214,9 @@ static inline unsigned long __ffs64(u64 word)
return __ffs((unsigned long)word);
}

+extern unsigned int all_bit_is_one(const unsigned long *addr, unsigned size);
+extern unsigned int all_bit_is_zero(const unsigned long *addr, unsigned size);
+
#ifdef __KERNEL__

#ifndef set_mask_bits
--
2.5.0


\
 
 \ /
  Last update: 2015-11-19 08:21    [W:0.051 / U:1.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site