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From: Michal Hocko <mhocko@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"David S. Miller" <davem@davemloft.net>,
	Tony Luck <tony.luck@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Chris Zankel <chris@zankel.net>,
	Max Filippov <jcmvbkbc@gmail.com>,
	x86@kernel.org, linux-alpha@vger.kernel.org,
	linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org,
	linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
	linux-xtensa@linux-xtensa.org, linux-arch@vger.kernel.org,
	Michal Hocko <mhocko@suse.com>
Subject: [PATCH 07/11] sh, rwsem: provide __down_write_killable
Date: Fri, 01 Apr 2016 11:04:51 +0000	[thread overview]
Message-ID: <1459508695-14915-8-git-send-email-mhocko@kernel.org> (raw)
In-Reply-To: <1459508695-14915-1-git-send-email-mhocko@kernel.org>

From: Michal Hocko <mhocko@suse.com>

which uses the same fast path as __down_write except it falls back to
rwsem_down_write_failed_killable slow path and return -EINTR if killed.

Signed-off-by: Michal Hocko <mhocko@suse.com>
---
 arch/sh/include/asm/rwsem.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/sh/include/asm/rwsem.h b/arch/sh/include/asm/rwsem.h
index f6c951c7a875..8a457b83d2a5 100644
--- a/arch/sh/include/asm/rwsem.h
+++ b/arch/sh/include/asm/rwsem.h
@@ -54,6 +54,19 @@ static inline void __down_write(struct rw_semaphore *sem)
 		rwsem_down_write_failed(sem);
 }
 
+static inline int __down_write_killable(struct rw_semaphore *sem)
+{
+	int tmp;
+
+	tmp = atomic_add_return(RWSEM_ACTIVE_WRITE_BIAS,
+				(atomic_t *)(&sem->count));
+	if (tmp != RWSEM_ACTIVE_WRITE_BIAS)
+		if (IS_ERR(rwsem_down_write_failed_killable(sem)))
+			return -EINTR;
+
+	return 0;
+}
+
 static inline int __down_write_trylock(struct rw_semaphore *sem)
 {
 	int tmp;
-- 
2.8.0.rc3


WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"David S. Miller" <davem@davemloft.net>,
	Tony Luck <tony.luck@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Chris Zankel <chris@zankel.net>,
	Max Filippov <jcmvbkbc@gmail.com>,
	x86@kernel.org, linux-alpha@vger.kernel.org,
	linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org,
	linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
	linux-xtensa@linux-xtensa.org, linux-arch@vger.kernel.org,
	Michal Hocko <mhocko@suse.com>
Subject: [PATCH 07/11] sh, rwsem: provide __down_write_killable
Date: Fri,  1 Apr 2016 13:04:51 +0200	[thread overview]
Message-ID: <1459508695-14915-8-git-send-email-mhocko@kernel.org> (raw)
In-Reply-To: <1459508695-14915-1-git-send-email-mhocko@kernel.org>

From: Michal Hocko <mhocko@suse.com>

which uses the same fast path as __down_write except it falls back to
rwsem_down_write_failed_killable slow path and return -EINTR if killed.

Signed-off-by: Michal Hocko <mhocko@suse.com>
---
 arch/sh/include/asm/rwsem.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/sh/include/asm/rwsem.h b/arch/sh/include/asm/rwsem.h
index f6c951c7a875..8a457b83d2a5 100644
--- a/arch/sh/include/asm/rwsem.h
+++ b/arch/sh/include/asm/rwsem.h
@@ -54,6 +54,19 @@ static inline void __down_write(struct rw_semaphore *sem)
 		rwsem_down_write_failed(sem);
 }
 
+static inline int __down_write_killable(struct rw_semaphore *sem)
+{
+	int tmp;
+
+	tmp = atomic_add_return(RWSEM_ACTIVE_WRITE_BIAS,
+				(atomic_t *)(&sem->count));
+	if (tmp != RWSEM_ACTIVE_WRITE_BIAS)
+		if (IS_ERR(rwsem_down_write_failed_killable(sem)))
+			return -EINTR;
+
+	return 0;
+}
+
 static inline int __down_write_trylock(struct rw_semaphore *sem)
 {
 	int tmp;
-- 
2.8.0.rc3

  parent reply	other threads:[~2016-04-01 11:04 UTC|newest]

Thread overview: 226+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-29 12:58 [PATCH 0/11] introduce down_write_killable for rw_semaphore Michal Hocko
2016-02-29 12:58 ` Michal Hocko
2016-02-29 12:58 ` [PATCH 01/11] locking, rwsem: get rid of __down_write_nested Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 02/11] locking, rwsem: drop explicit memory barriers Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 03/11] locking, rwsem: introduce basis for down_write_killable Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-03-30 13:25   ` Peter Zijlstra
2016-03-30 13:25     ` Peter Zijlstra
2016-03-31  8:33     ` Michal Hocko
2016-03-31  8:33       ` Michal Hocko
2016-03-31  8:44       ` Peter Zijlstra
2016-03-31  8:44         ` Peter Zijlstra
2016-03-31  8:55   ` [PATCH] " Michal Hocko
2016-03-31  8:55     ` Michal Hocko
2016-02-29 12:58 ` [PATCH 04/11] alpha, rwsem: provide __down_write_killable Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 05/11] ia64, " Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 06/11] s390, " Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 07/11] sh, " Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 08/11] sparc, " Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 09/11] xtensa, " Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 10/11] x86, " Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-02-29 12:58 ` [PATCH 11/11] locking, rwsem: provide down_write_killable Michal Hocko
2016-02-29 12:58   ` Michal Hocko
2016-03-30 13:32 ` [PATCH 0/11] introduce down_write_killable for rw_semaphore Peter Zijlstra
2016-03-30 13:32   ` Peter Zijlstra
2016-03-31  8:59   ` Michal Hocko
2016-03-31  8:59     ` Michal Hocko
2016-03-31  9:20     ` Ingo Molnar
2016-03-31  9:20       ` Ingo Molnar
2016-03-31 10:58       ` Michal Hocko
2016-03-31 10:58         ` Michal Hocko
2016-03-31 17:03       ` Andrew Morton
2016-03-31 17:03         ` Andrew Morton
2016-04-01  6:33         ` Ingo Molnar
2016-04-01  6:33           ` Ingo Molnar
2016-04-01  9:21           ` Michal Hocko
2016-04-01  9:21             ` Michal Hocko
2016-04-01  9:50             ` Ingo Molnar
2016-04-01  9:50               ` Ingo Molnar
2016-04-01 10:52               ` Michal Hocko
2016-04-01 10:52                 ` Michal Hocko
2016-04-01  7:26         ` Michal Hocko
2016-04-01  7:26           ` Michal Hocko
2016-04-01  9:11           ` Andrew Morton
2016-04-01  9:11             ` Andrew Morton
2016-04-01 11:04 ` [PATCH 0/11] introduce down_write_killable for rw_semaphore v2 Michal Hocko
2016-04-01 11:04   ` Michal Hocko
2016-04-01 11:04   ` [PATCH 01/11] locking, rwsem: get rid of __down_write_nested Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-02  0:28     ` Davidlohr Bueso
2016-04-02  0:28       ` Davidlohr Bueso
2016-04-01 11:04   ` [PATCH 02/11] locking, rwsem: drop explicit memory barriers Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-02  1:17     ` Davidlohr Bueso
2016-04-02  1:17       ` Davidlohr Bueso
2016-04-04  9:03       ` Michal Hocko
2016-04-04  9:03         ` Michal Hocko
2016-04-04  9:06         ` [PATCH 1/2] xtensa, rwsem: drop superfluous arch specific implementation Michal Hocko
2016-04-04  9:06           ` Michal Hocko
2016-04-04  9:06           ` [PATCH 2/2] sh, " Michal Hocko
2016-04-04  9:06             ` Michal Hocko
2016-04-06  9:26             ` Peter Zijlstra
2016-04-06  9:26               ` Peter Zijlstra
2016-04-06  9:50               ` Geert Uytterhoeven
2016-04-06  9:50                 ` Geert Uytterhoeven
2016-04-06 10:27                 ` Peter Zijlstra
2016-04-06 10:27                   ` Peter Zijlstra
2016-04-04 10:23           ` [PATCH 1/2] xtensa, " Max Filippov
2016-04-04 10:23             ` Max Filippov
2016-04-06  9:06       ` [PATCH] sparc, " Michal Hocko
2016-04-06  9:06         ` Michal Hocko
2016-04-06  9:06         ` Michal Hocko
2016-04-06  9:06         ` Michal Hocko
2016-04-01 11:04   ` [PATCH 03/11] locking, rwsem: introduce basis for down_write_killable Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-02  4:41     ` Davidlohr Bueso
2016-04-02  4:41       ` Davidlohr Bueso
2016-04-04  9:17       ` Michal Hocko
2016-04-04  9:17         ` Michal Hocko
2016-04-04  9:21         ` Peter Zijlstra
2016-04-04  9:21           ` Peter Zijlstra
2016-04-07  6:58         ` Davidlohr Bueso
2016-04-07  6:58           ` Davidlohr Bueso
2016-04-07  7:38           ` Michal Hocko
2016-04-07  7:38             ` Michal Hocko
2016-05-10 10:43     ` Tetsuo Handa
2016-05-10 11:53       ` Michal Hocko
2016-05-10 12:38         ` Peter Zijlstra
2016-05-10 13:57           ` Tetsuo Handa
2016-05-11  7:23           ` Michal Hocko
2016-05-11  8:28             ` Michal Hocko
2016-05-11  8:44               ` Peter Zijlstra
2016-05-11  9:04                 ` Michal Hocko
2016-05-11  9:17                   ` Peter Zijlstra
2016-05-11  9:31                     ` Michal Hocko
2016-05-11  9:41                       ` Peter Zijlstra
2016-05-11 13:59                         ` Michal Hocko
2016-05-11 18:03                           ` Michal Hocko
2016-05-12 11:57                             ` [PATCH] locking, rwsem: Fix down_write_killable() Peter Zijlstra
2016-05-12 12:15                               ` [tip:locking/rwsem] locking/rwsem: " tip-bot for Peter Zijlstra
2016-05-12 16:59                               ` [PATCH] locking, rwsem: " Michal Hocko
2016-05-15 20:57                               ` [tip:locking/rwsem] locking/rwsem: " tip-bot for Peter Zijlstra
2016-05-12 12:12                             ` [PATCH 03/11] locking, rwsem: introduce basis for down_write_killable Peter Zijlstra
2016-05-12 12:19                               ` Michal Hocko
2016-05-12 13:58                                 ` Peter Zijlstra
2016-05-12 19:42                                 ` Waiman Long
2016-05-11  8:35             ` Peter Zijlstra
2016-05-11  9:02               ` Michal Hocko
2016-04-01 11:04   ` [PATCH 04/11] alpha, rwsem: provide __down_write_killable Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-01 11:04   ` [PATCH 05/11] ia64, " Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-01 11:04   ` [PATCH 06/11] s390, " Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-01 11:04   ` Michal Hocko [this message]
2016-04-01 11:04     ` [PATCH 07/11] sh, " Michal Hocko
2016-04-01 11:04   ` [PATCH 08/11] sparc, " Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-01 11:04   ` [PATCH 09/11] xtensa, " Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-01 11:04   ` [PATCH 10/11] x86, " Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-06 18:31     ` Peter Zijlstra
2016-04-06 18:31       ` Peter Zijlstra
2016-04-01 11:04   ` [PATCH 11/11] locking, rwsem: provide down_write_killable Michal Hocko
2016-04-01 11:04     ` Michal Hocko
2016-04-07 15:12 ` [PATCH 0/11] introduce down_write_killable for rw_semaphore v3 Michal Hocko
2016-04-07 15:12   ` Michal Hocko
2016-04-07 15:12   ` [PATCH 01/11] locking, rwsem: get rid of __down_write_nested Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-13 11:32     ` [tip:locking/rwsem] locking/rwsem: Get rid of __down_write_nested() tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 02/11] locking, rwsem: drop explicit memory barriers Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-13 11:32     ` [tip:locking/rwsem] locking/rwsem: Drop " tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 03/11] xtensa, rwsem: drop superfluous arch specific implementation Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-13 11:33     ` [tip:locking/rwsem] locking/rwsem, xtensa: Drop " tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 04/11] sh, rwsem: drop " Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-13 11:33     ` [tip:locking/rwsem] locking/rwsem, sh: Drop " tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 05/11] sparc, rwsem: drop " Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-13 11:33     ` [tip:locking/rwsem] locking/rwsem, sparc: Drop " tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 06/11] locking, rwsem: introduce basis for down_write_killable Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-13 11:34     ` [tip:locking/rwsem] locking/rwsem: Introduce basis for down_write_killable() tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 07/11] alpha, rwsem: provide __down_write_killable Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-22  9:42     ` [tip:locking/rwsem] locking/rwsem, alpha: Provide __down_write_killable() tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 08/11] ia64, rwsem: provide __down_write_killable Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-07 17:28     ` Sergei Shtylyov
2016-04-07 17:28       ` Sergei Shtylyov
2016-04-08  6:22       ` Michal Hocko
2016-04-08  6:22         ` Michal Hocko
2016-04-22  9:43     ` [tip:locking/rwsem] locking/rwsem, ia64: Provide __down_write_killable() tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 09/11] s390, rwsem: provide __down_write_killable Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-22  9:43     ` [tip:locking/rwsem] locking/rwsem, s390: Provide __down_write_killable() tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 10/11] x86, rwsem: provide __down_write_killable Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-13  9:08     ` Ingo Molnar
2016-04-13  9:08       ` Ingo Molnar
2016-04-13  9:16       ` Michal Hocko
2016-04-13  9:16         ` Michal Hocko
2016-04-13  9:19         ` Ingo Molnar
2016-04-13  9:19           ` Ingo Molnar
2016-04-13 10:27           ` Ingo Molnar
2016-04-13 10:27             ` Ingo Molnar
2016-04-13 12:49             ` Michal Hocko
2016-04-13 12:49               ` Michal Hocko
2016-04-13 12:49               ` Michal Hocko
2016-04-13 12:49               ` Michal Hocko
2016-04-17 16:59               ` Michal Hocko
2016-04-17 16:59                 ` Michal Hocko
2016-04-17 16:59                 ` Michal Hocko
2016-04-20 13:40               ` Peter Zijlstra
2016-04-20 13:40                 ` Peter Zijlstra
2016-04-20 13:40                 ` Peter Zijlstra
2016-04-20 18:04                 ` H. Peter Anvin
2016-04-20 18:04                   ` H. Peter Anvin
2016-04-20 20:45                   ` Borislav Petkov
2016-04-20 20:45                     ` Borislav Petkov
2016-04-20 20:58                     ` Michal Hocko
2016-04-20 20:58                       ` Michal Hocko
2016-04-20 21:06                     ` H. Peter Anvin
2016-04-20 21:06                       ` H. Peter Anvin
2016-04-20 21:36                       ` Borislav Petkov
2016-04-20 21:36                         ` Borislav Petkov
2016-04-20 22:29                         ` H. Peter Anvin
2016-04-20 22:29                           ` H. Peter Anvin
2016-04-21 11:35                           ` Borislav Petkov
2016-04-21 11:35                             ` Borislav Petkov
2016-04-21 13:09                             ` Michal Hocko
2016-04-21 13:09                               ` Michal Hocko
2016-04-21 13:21                               ` Borislav Petkov
2016-04-21 13:21                                 ` Borislav Petkov
2016-04-27 12:02                           ` [PATCH] x86/locking/rwsem: Cleanup ____down_write() Borislav Petkov
2016-04-27 12:02                             ` Borislav Petkov
2016-04-28 10:27                             ` [tip:locking/rwsem] locking/rwsem, x86: Clean up ____down_write() tip-bot for Borislav Petkov
2016-04-22  6:53                 ` [PATCH 10/11] x86, rwsem: provide __down_write_killable Ingo Molnar
2016-04-22  6:53                   ` Ingo Molnar
2016-04-22  6:53                   ` Ingo Molnar
2016-04-13  9:57     ` [PATCH] x86: add frame annotation for call_rwsem_down_write_failed_killable Michal Hocko
2016-04-13  9:57       ` Michal Hocko
2016-04-13  9:57       ` Michal Hocko
2016-04-22  9:44       ` [tip:locking/rwsem] locking/rwsem, x86: Add frame annotation for call_rwsem_down_write_failed_killable() tip-bot for Michal Hocko
2016-04-22  9:43     ` [tip:locking/rwsem] locking/rwsem, x86: Provide __down_write_killable() tip-bot for Michal Hocko
2016-04-07 15:12   ` [PATCH 11/11] locking, rwsem: provide down_write_killable Michal Hocko
2016-04-07 15:12     ` Michal Hocko
2016-04-22  9:44     ` [tip:locking/rwsem] locking/rwsem: Provide down_write_killable() tip-bot for Michal Hocko
2016-04-12  9:37   ` [PATCH 0/11] introduce down_write_killable for rw_semaphore v3 Michal Hocko
2016-04-12  9:37     ` Michal Hocko
2016-04-12 15:40     ` Peter Zijlstra
2016-04-12 15:40       ` Peter Zijlstra
2016-04-12 18:01       ` Michal Hocko
2016-04-12 18:01         ` Michal Hocko

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