From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: [patch 8/13] s390: spinlock fixes.
Date: Thu, 12 Jan 2006 18:16:57 +0100 [thread overview]
Message-ID: <20060112171657.GI16629@skybase.boeblingen.de.ibm.com> (raw)
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
[patch 8/13] s390: spinlock fixes.
Remove useless spin_retry_counter and fix compilation for UP kernels.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/lib/Makefile | 3 ++-
arch/s390/lib/spinlock.c | 7 -------
kernel/sysctl.c | 2 +-
3 files changed, 3 insertions(+), 9 deletions(-)
diff -urpN linux-2.6/arch/s390/lib/Makefile linux-2.6-patched/arch/s390/lib/Makefile
--- linux-2.6/arch/s390/lib/Makefile 2006-01-12 15:43:19.000000000 +0100
+++ linux-2.6-patched/arch/s390/lib/Makefile 2006-01-12 15:43:58.000000000 +0100
@@ -4,5 +4,6 @@
EXTRA_AFLAGS := -traditional
-lib-y += delay.o string.o spinlock.o
+lib-y += delay.o string.o
lib-y += $(if $(CONFIG_64BIT),uaccess64.o,uaccess.o)
+lib-$(CONFIG_SMP) += spinlock.o
\ No newline at end of file
diff -urpN linux-2.6/arch/s390/lib/spinlock.c linux-2.6-patched/arch/s390/lib/spinlock.c
--- linux-2.6/arch/s390/lib/spinlock.c 2006-01-12 15:43:19.000000000 +0100
+++ linux-2.6-patched/arch/s390/lib/spinlock.c 2006-01-12 15:43:58.000000000 +0100
@@ -13,7 +13,6 @@
#include <linux/init.h>
#include <asm/io.h>
-atomic_t spin_retry_counter;
int spin_retry = 1000;
/**
@@ -45,7 +44,6 @@ _raw_spin_lock_wait(raw_spinlock_t *lp,
_diag44();
count = spin_retry;
}
- atomic_inc(&spin_retry_counter);
if (_raw_compare_and_swap(&lp->lock, 0, pc) == 0)
return;
}
@@ -58,7 +56,6 @@ _raw_spin_trylock_retry(raw_spinlock_t *
int count = spin_retry;
while (count-- > 0) {
- atomic_inc(&spin_retry_counter);
if (_raw_compare_and_swap(&lp->lock, 0, pc) == 0)
return 1;
}
@@ -77,7 +74,6 @@ _raw_read_lock_wait(raw_rwlock_t *rw)
_diag44();
count = spin_retry;
}
- atomic_inc(&spin_retry_counter);
old = rw->lock & 0x7fffffffU;
if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old)
return;
@@ -92,7 +88,6 @@ _raw_read_trylock_retry(raw_rwlock_t *rw
int count = spin_retry;
while (count-- > 0) {
- atomic_inc(&spin_retry_counter);
old = rw->lock & 0x7fffffffU;
if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old)
return 1;
@@ -111,7 +106,6 @@ _raw_write_lock_wait(raw_rwlock_t *rw)
_diag44();
count = spin_retry;
}
- atomic_inc(&spin_retry_counter);
if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)
return;
}
@@ -124,7 +118,6 @@ _raw_write_trylock_retry(raw_rwlock_t *r
int count = spin_retry;
while (count-- > 0) {
- atomic_inc(&spin_retry_counter);
if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)
return 1;
}
diff -urpN linux-2.6/kernel/sysctl.c linux-2.6-patched/kernel/sysctl.c
--- linux-2.6/kernel/sysctl.c 2006-01-12 15:43:35.000000000 +0100
+++ linux-2.6-patched/kernel/sysctl.c 2006-01-12 15:43:58.000000000 +0100
@@ -648,7 +648,7 @@ static ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = &proc_dointvec,
},
-#if defined(CONFIG_S390)
+#if defined(CONFIG_S390) && defined(CONFIG_SMP)
{
.ctl_name = KERN_SPIN_RETRY,
.procname = "spin_retry",
reply other threads:[~2006-01-12 17:17 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20060112171657.GI16629@skybase.boeblingen.de.ibm.com \
--to=schwidefsky@de.ibm.com \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®