linux-kernel - [PATCH 01/11] signals: kill sigfindinword()

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Date:	Sun, 23 Mar 2014 20:37:45 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Al Viro <viro@...IV.linux.org.uk>,
	David Woodhouse <dwmw2@...radead.org>,
	Richard Weinberger <richard@....at>, Tejun Heo <tj@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 01/11] signals: kill sigfindinword()

It has no users and it doesn't look useful. I do not know why/when it
was introduced, I can't even find any user in the git history.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---
 arch/m68k/include/asm/signal.h |    9 ---------
 arch/x86/include/asm/signal.h  |    6 ------
 include/linux/signal.h         |    5 -----
 3 files changed, 0 insertions(+), 20 deletions(-)

diff --git a/arch/m68k/include/asm/signal.h b/arch/m68k/include/asm/signal.h
index 214320b..8c8ce5e 100644
--- a/arch/m68k/include/asm/signal.h
+++ b/arch/m68k/include/asm/signal.h
@@ -60,15 +60,6 @@ static inline int __gen_sigismember(sigset_t *set, int _sig)
 	 __const_sigismember(set,sig) :		\
 	 __gen_sigismember(set,sig))
 
-static inline int sigfindinword(unsigned long word)
-{
-	asm ("bfffo %1{#0,#0},%0"
-		: "=d" (word)
-		: "d" (word & -word)
-		: "cc");
-	return word ^ 31;
-}
-
 #endif /* !CONFIG_CPU_HAS_NO_BITFIELDS */
 
 #ifndef __uClinux__
diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
index 35e67a4..31eab86 100644
--- a/arch/x86/include/asm/signal.h
+++ b/arch/x86/include/asm/signal.h
@@ -92,12 +92,6 @@ static inline int __gen_sigismember(sigset_t *set, int _sig)
 	 ? __const_sigismember((set), (sig))	\
 	 : __gen_sigismember((set), (sig)))
 
-static inline int sigfindinword(unsigned long word)
-{
-	asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
-	return word;
-}
-
 struct pt_regs;
 
 #else /* __i386__ */
diff --git a/include/linux/signal.h b/include/linux/signal.h
index 2ac423b..ae744c3 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -63,11 +63,6 @@ static inline int sigismember(sigset_t *set, int _sig)
 		return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
 }
 
-static inline int sigfindinword(unsigned long word)
-{
-	return ffz(~word);
-}
-
 #endif /* __HAVE_ARCH_SIG_BITOPS */
 
 static inline int sigisemptyset(sigset_t *set)
-- 
1.5.5.1

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