linux-kernel - [PATCH tip/core/rcu 04/15] lockdep: Cleanup PREEMPT

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: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200928233102.24265-4-paulmck@kernel.org>
Date:   Mon, 28 Sep 2020 16:30:51 -0700
From:   paulmck@...nel.org
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, akpm@...ux-foundation.org,
        mathieu.desnoyers@...icios.com, josh@...htriplett.org,
        tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
        dhowells@...hat.com, edumazet@...gle.com, fweisbec@...il.com,
        oleg@...hat.com, joel@...lfernandes.org, mhocko@...nel.org,
        mgorman@...hsingularity.net, torvalds@...ux-foundation.org,
        Will Deacon <will@...nel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: [PATCH tip/core/rcu 04/15] lockdep: Cleanup PREEMPT_COUNT leftovers

From: Thomas Gleixner <tglx@...utronix.de>

CONFIG_PREEMPT_COUNT is now unconditionally enabled and will be
removed. Cleanup the leftovers before doing so.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Will Deacon <will@...nel.org>
Acked-by: Will Deacon <will@...nel.org>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 include/linux/lockdep.h | 6 ++----
 lib/Kconfig.debug       | 1 -
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 6a584b3..879de69 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -560,16 +560,14 @@ do {									\
 
 #define lockdep_assert_preemption_enabled()				\
 do {									\
-	WARN_ON_ONCE(IS_ENABLED(CONFIG_PREEMPT_COUNT)	&&		\
-		     debug_locks			&&		\
+	WARN_ON_ONCE(debug_locks			&&		\
 		     (preempt_count() != 0		||		\
 		      !raw_cpu_read(hardirqs_enabled)));		\
 } while (0)
 
 #define lockdep_assert_preemption_disabled()				\
 do {									\
-	WARN_ON_ONCE(IS_ENABLED(CONFIG_PREEMPT_COUNT)	&&		\
-		     debug_locks			&&		\
+	WARN_ON_ONCE(debug_locks			&&		\
 		     (preempt_count() == 0		&&		\
 		      raw_cpu_read(hardirqs_enabled)));			\
 } while (0)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index f50fbcf..d4d0574 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1161,7 +1161,6 @@ config PROVE_LOCKING
 	select DEBUG_RWSEMS
 	select DEBUG_WW_MUTEX_SLOWPATH
 	select DEBUG_LOCK_ALLOC
-	select PREEMPT_COUNT
 	select TRACE_IRQFLAGS
 	default n
 	help
-- 
2.9.5