lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <168897827110.404.18144213137097595757.tip-bot2@tip-bot2>
Date:   Mon, 10 Jul 2023 08:37:51 -0000
From:   "tip-bot2 for Uros Bizjak" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Charlemagne Lasse <charlemagnelasse@...il.com>,
        Uros Bizjak <ubizjak@...il.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] locking/arch: Avoid variable shadowing in
 local_try_cmpxchg()

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     d6b45484c130f4095313ae3edeb4aae662c12fb1
Gitweb:        https://git.kernel.org/tip/d6b45484c130f4095313ae3edeb4aae662c12fb1
Author:        Uros Bizjak <ubizjak@...il.com>
AuthorDate:    Sat, 08 Jul 2023 11:00:36 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 10 Jul 2023 09:52:36 +02:00

locking/arch: Avoid variable shadowing in local_try_cmpxchg()

Several architectures define arch_try_local_cmpxchg macro using
internal temporary variables named ___old, __old or _old. Remove
temporary varible in local_try_cmpxchg to avoid variable shadowing.

No functional change intended.

Fixes: d994f2c8e241 ("locking/arch: Wire up local_try_cmpxchg()")
Closes: https://lore.kernel.org/lkml/CAFGhKbyxtuk=LoW-E3yLXgcmR93m+Dfo5-u9oQA_YC5Fcy_t9g@mail.gmail.com/
Reported-by: Charlemagne Lasse <charlemagnelasse@...il.com>
Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/20230708090048.63046-1-ubizjak@gmail.com
---
 arch/loongarch/include/asm/local.h | 4 ++--
 arch/mips/include/asm/local.h      | 4 ++--
 arch/x86/include/asm/local.h       | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/loongarch/include/asm/local.h b/arch/loongarch/include/asm/local.h
index 83e995b..c496758 100644
--- a/arch/loongarch/include/asm/local.h
+++ b/arch/loongarch/include/asm/local.h
@@ -63,8 +63,8 @@ static inline long local_cmpxchg(local_t *l, long old, long new)
 
 static inline bool local_try_cmpxchg(local_t *l, long *old, long new)
 {
-	typeof(l->a.counter) *__old = (typeof(l->a.counter) *) old;
-	return try_cmpxchg_local(&l->a.counter, __old, new);
+	return try_cmpxchg_local(&l->a.counter,
+				 (typeof(l->a.counter) *) old, new);
 }
 
 #define local_xchg(l, n) (atomic_long_xchg((&(l)->a), (n)))
diff --git a/arch/mips/include/asm/local.h b/arch/mips/include/asm/local.h
index 5daf6fe..e6ae3df 100644
--- a/arch/mips/include/asm/local.h
+++ b/arch/mips/include/asm/local.h
@@ -101,8 +101,8 @@ static __inline__ long local_cmpxchg(local_t *l, long old, long new)
 
 static __inline__ bool local_try_cmpxchg(local_t *l, long *old, long new)
 {
-	typeof(l->a.counter) *__old = (typeof(l->a.counter) *) old;
-	return try_cmpxchg_local(&l->a.counter, __old, new);
+	return try_cmpxchg_local(&l->a.counter,
+				 (typeof(l->a.counter) *) old, new);
 }
 
 #define local_xchg(l, n) (atomic_long_xchg((&(l)->a), (n)))
diff --git a/arch/x86/include/asm/local.h b/arch/x86/include/asm/local.h
index 56d4ef6..635132a 100644
--- a/arch/x86/include/asm/local.h
+++ b/arch/x86/include/asm/local.h
@@ -127,8 +127,8 @@ static inline long local_cmpxchg(local_t *l, long old, long new)
 
 static inline bool local_try_cmpxchg(local_t *l, long *old, long new)
 {
-	typeof(l->a.counter) *__old = (typeof(l->a.counter) *) old;
-	return try_cmpxchg_local(&l->a.counter, __old, new);
+	return try_cmpxchg_local(&l->a.counter,
+				 (typeof(l->a.counter) *) old, new);
 }
 
 /* Always has a lock prefix */

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ