Release 4.8 arch/alpha/lib/dec_and_lock.c

/*
 * arch/alpha/lib/dec_and_lock.c
 *
 * ll/sc version of atomic_dec_and_lock()
 * 
 */

#include <linux/spinlock.h>
#include <linux/atomic.h>

  asm (".text                                     \n\
        .global _atomic_dec_and_lock            \n\
        .ent _atomic_dec_and_lock               \n\
        .align  4                               \n\
_atomic_dec_and_lock:                           \n\
        .prologue 0                             \n\
1:      ldl_l   $1, 0($16)                      \n\
        subl    $1, 1, $1                       \n\
        beq     $1, 2f                          \n\
        stl_c   $1, 0($16)                      \n\
        beq     $1, 4f                          \n\
        mb                                      \n\
        clr     $0                              \n\
        ret                                     \n\
2:      br      $29, 3f                         \n\
3:      ldgp    $29, 0($29)                     \n\
        br      $atomic_dec_and_lock_1..ng      \n\
        .subsection 2                           \n\
4:      br      1b                              \n\
        .previous                               \n\
        .end _atomic_dec_and_lock");



static int __used atomic_dec_and_lock_1(atomic_t *atomic, spinlock_t *lock)
{
	/* Slow path */
	spin_lock(lock);
	if (atomic_dec_and_test(atomic))
		return 1;
	spin_unlock(lock);
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
33
84.62%
1
33.33%
richard henderson
richard henderson
5
12.82%
1
33.33%
adrian bunk
adrian bunk
1
2.56%
1
33.33%
Total
39
100.00%
3
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
40
85.11%
2
40.00%
richard henderson
richard henderson
5
10.64%
1
20.00%
arun sharma
arun sharma
1
2.13%
1
20.00%
adrian bunk
adrian bunk
1
2.13%
1
20.00%
Total
47
100.00%
5
100.00%
  
Directory: arch/alpha/lib

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.