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author | David S. Miller <davem@davemloft.net> | 2012-05-20 04:51:02 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2012-05-20 04:51:02 (GMT) |
commit | 4f722a62aac3a785713ba27fa189672d50231992 (patch) | |
tree | 81e2e73174a236c331281da8934a93e15d6263b2 /arch/sparc/include/asm | |
parent | a11b246a48dc51bb29969622c59090d621f3b849 (diff) | |
download | linux-fsl-qoriq-4f722a62aac3a785713ba27fa189672d50231992.tar.xz |
sparc32: Delete asm/smpprim.h
Completely unused.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm')
-rw-r--r-- | arch/sparc/include/asm/smpprim.h | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/arch/sparc/include/asm/smpprim.h b/arch/sparc/include/asm/smpprim.h deleted file mode 100644 index eb849d8..0000000 --- a/arch/sparc/include/asm/smpprim.h +++ /dev/null @@ -1,54 +0,0 @@ -/* - * smpprim.h: SMP locking primitives on the Sparc - * - * God knows we won't be actually using this code for some time - * but I thought I'd write it since I knew how. - * - * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) - */ - -#ifndef __SPARC_SMPPRIM_H -#define __SPARC_SMPPRIM_H - -/* Test and set the unsigned byte at ADDR to 1. Returns the previous - * value. On the Sparc we use the ldstub instruction since it is - * atomic. - */ - -static inline __volatile__ char test_and_set(void *addr) -{ - char state = 0; - - __asm__ __volatile__("ldstub [%0], %1 ! test_and_set\n\t" - "=r" (addr), "=r" (state) : - "0" (addr), "1" (state) : "memory"); - - return state; -} - -/* Initialize a spin-lock. */ -static inline __volatile__ smp_initlock(void *spinlock) -{ - /* Unset the lock. */ - *((unsigned char *) spinlock) = 0; - - return; -} - -/* This routine spins until it acquires the lock at ADDR. */ -static inline __volatile__ smp_lock(void *addr) -{ - while(test_and_set(addr) == 0xff) - ; - - /* We now have the lock */ - return; -} - -/* This routine releases the lock at ADDR. */ -static inline __volatile__ smp_unlock(void *addr) -{ - *((unsigned char *) addr) = 0; -} - -#endif /* !(__SPARC_SMPPRIM_H) */ |