diff options
Diffstat (limited to 'arch/sparc/lib/locks.S')
| -rw-r--r-- | arch/sparc/lib/locks.S | 21 |
1 files changed, 1 insertions, 20 deletions
diff --git a/arch/sparc/lib/locks.S b/arch/sparc/lib/locks.S index 102541b18..e199f3813 100644 --- a/arch/sparc/lib/locks.S +++ b/arch/sparc/lib/locks.S @@ -1,4 +1,4 @@ -/* $Id: locks.S,v 1.15 1998/10/14 09:18:55 jj Exp $ +/* $Id: locks.S,v 1.16 2000/02/26 11:02:47 anton Exp $ * locks.S: SMP low-level lock primitives on Sparc. * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) @@ -15,25 +15,6 @@ .text .align 4 - /* This is called when the initial acquisition attempt of a spin - * lock fails. The calling convention is weird, return address - * is in %o7 as usual but we agree with the caller to only touch - * and use %g2 as a temporary. We are passed a ptr to the lock - * itself in %g1, %g4 must be restored into %o7 when we return, - * and the caller wants us to return to him at three instructions - * previous to the call instruction which got us here. See how - * this is used in asm/spinlock.h if what I just said confuses - * you to no end. - */ - .globl ___spinlock_waitfor -___spinlock_waitfor: -1: orcc %g2, 0x0, %g0 - bne,a 1b - ldub [%g1], %g2 - ldstub [%g1], %g2 - jmpl %o7 - 12, %g0 - mov %g4, %o7 - /* Read/writer locks, as usual this is overly clever to make it * as fast as possible. */ |