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Commit 0152fb37 authored by Martin Schwidefsky's avatar Martin Schwidefsky Committed by Linus Torvalds
Browse files

[PATCH] s390: spinlock fixes 



Remove useless spin_retry_counter and fix compilation for UP kernels.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 68c11917

arch/s390/lib/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -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

arch/s390/lib/spinlock.c

+0 −7
Original line number Diff line number Diff line
@@ -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, unsigned int pc) 
			_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 *lp, unsigned int pc) 
	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 *rw) 
	int count = spin_retry;



	while (count-- > 0) {

		atomic_inc(&spin_retry_counter);

		if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)

			return 1;

	}

kernel/sysctl.c

+1 −1
Original line number Diff line number Diff line
@@ -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",