* [PATCH] sched: fix comment for sched_find_first_bit()
@ 2022-07-10 15:21 Eddie Lin
0 siblings, 0 replies; only message in thread
From: Eddie Lin @ 2022-07-10 15:21 UTC (permalink / raw)
To: arnd
Cc: rth, ink, mattst88, linux-alpha, linux-kernel, linux-arch, eddielin0926
The result of __ffs is undefined if the word is zero. Therefore, it
should be guaranteed that at least one of the 100 bits is set.
Signed-off-by: Eddie Lin <eddielin0926@gmail.com>
---
arch/alpha/include/asm/bitops.h | 4 ++--
include/asm-generic/bitops/sched.h | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/alpha/include/asm/bitops.h b/arch/alpha/include/asm/bitops.h
index e1d8483a4..9af3528f5 100644
--- a/arch/alpha/include/asm/bitops.h
+++ b/arch/alpha/include/asm/bitops.h
@@ -434,8 +434,8 @@ static inline unsigned int __arch_hweight8(unsigned int w)
/*
* Every architecture must define this function. It's the fastest
- * way of searching a 100-bit bitmap. It's guaranteed that at least
- * one of the 100 bits is cleared.
+ * way of searching a 100-bit bitmap. It's guaranteed that at least
+ * one of the 100 bits is set.
*/
static inline unsigned long
sched_find_first_bit(const unsigned long b[2])
diff --git a/include/asm-generic/bitops/sched.h b/include/asm-generic/bitops/sched.h
index 86470cfce..2b614eb40 100644
--- a/include/asm-generic/bitops/sched.h
+++ b/include/asm-generic/bitops/sched.h
@@ -7,8 +7,8 @@
/*
* Every architecture must define this function. It's the fastest
- * way of searching a 100-bit bitmap. It's guaranteed that at least
- * one of the 100 bits is cleared.
+ * way of searching a 100-bit bitmap. It's guaranteed that at least
+ * one of the 100 bits is set.
*/
static inline int sched_find_first_bit(const unsigned long *b)
{
--
2.25.1
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