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[PATCH v3 1/2] bitops.h: Improve find_xxx_bit() documentation
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH v3 1/2] bitops.h: Improve find_xxx_bit() documentation |
Date: |
Mon, 10 May 2021 22:07:57 +0200 |
Document the following functions return the bitmap size
if no matching bit is found:
- find_first_bit
- find_next_bit
- find_last_bit
- find_first_zero_bit
- find_next_zero_bit
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
include/qemu/bitops.h | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 3acbf3384c6..a72f69fea85 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -140,7 +140,8 @@ static inline int test_bit(long nr, const unsigned long
*addr)
* @addr: The address to start the search at
* @size: The maximum size to search
*
- * Returns the bit number of the first set bit, or size.
+ * Returns the bit number of the last set bit,
+ * or @size if there is no set bit in the bitmap.
*/
unsigned long find_last_bit(const unsigned long *addr,
unsigned long size);
@@ -150,6 +151,9 @@ unsigned long find_last_bit(const unsigned long *addr,
* @addr: The address to base the search on
* @offset: The bitnumber to start searching at
* @size: The bitmap size in bits
+ *
+ * Returns the bit number of the next set bit,
+ * or @size if there are no further set bits in the bitmap.
*/
unsigned long find_next_bit(const unsigned long *addr,
unsigned long size,
@@ -160,6 +164,9 @@ unsigned long find_next_bit(const unsigned long *addr,
* @addr: The address to base the search on
* @offset: The bitnumber to start searching at
* @size: The bitmap size in bits
+ *
+ * Returns the bit number of the next cleared bit,
+ * or @size if there are no further clear bits in the bitmap.
*/
unsigned long find_next_zero_bit(const unsigned long *addr,
@@ -171,7 +178,8 @@ unsigned long find_next_zero_bit(const unsigned long *addr,
* @addr: The address to start the search at
* @size: The maximum size to search
*
- * Returns the bit number of the first set bit.
+ * Returns the bit number of the first set bit,
+ * or @size if there is no set bit in the bitmap.
*/
static inline unsigned long find_first_bit(const unsigned long *addr,
unsigned long size)
@@ -194,7 +202,8 @@ static inline unsigned long find_first_bit(const unsigned
long *addr,
* @addr: The address to start the search at
* @size: The maximum size to search
*
- * Returns the bit number of the first cleared bit.
+ * Returns the bit number of the first cleared bit,
+ * or @size if there is no clear bit in the bitmap.
*/
static inline unsigned long find_first_zero_bit(const unsigned long *addr,
unsigned long size)
--
2.26.3