mirror of
https://github.com/torvalds/linux
synced 2024-09-22 03:55:39 +00:00
da9bb1d27b
This is a subset of the bluesmoke project core code, stripped of the NMI work which isn't ready to merge and some of the "interesting" proc functionality that needs reworking or just has no place in kernel. It requires no core kernel changes except the added scrub functions already posted. The goal is to merge further functionality only after the core code is accepted and proven in the base kernel, and only at the point the upstream extras are really ready to merge. From: doug thompson <norsk5@xmission.com> This converts EDAC to sysfs and is the final chunk neccessary before EDAC has a stable user space API and can be considered for submission into the base kernel. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: doug thompson <norsk5@xmission.com> Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
431 lines
9.5 KiB
C
431 lines
9.5 KiB
C
#ifndef __ARCH_X86_64_ATOMIC__
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#define __ARCH_X86_64_ATOMIC__
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#include <linux/config.h>
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#include <asm/types.h>
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/* atomic_t should be 32 bit signed type */
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/*
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* Atomic operations that C can't guarantee us. Useful for
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* resource counting etc..
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*/
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#ifdef CONFIG_SMP
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#define LOCK "lock ; "
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#else
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#define LOCK ""
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#endif
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/*
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* Make sure gcc doesn't try to be clever and move things around
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* on us. We need to use _exactly_ the address the user gave us,
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* not some alias that contains the same information.
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*/
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typedef struct { volatile int counter; } atomic_t;
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#define ATOMIC_INIT(i) { (i) }
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/**
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* atomic_read - read atomic variable
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* @v: pointer of type atomic_t
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*
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* Atomically reads the value of @v.
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*/
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#define atomic_read(v) ((v)->counter)
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/**
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* atomic_set - set atomic variable
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* @v: pointer of type atomic_t
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* @i: required value
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*
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* Atomically sets the value of @v to @i.
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*/
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#define atomic_set(v,i) (((v)->counter) = (i))
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/**
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* atomic_add - add integer to atomic variable
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* @i: integer value to add
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* @v: pointer of type atomic_t
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*
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* Atomically adds @i to @v.
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*/
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static __inline__ void atomic_add(int i, atomic_t *v)
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{
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__asm__ __volatile__(
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LOCK "addl %1,%0"
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:"=m" (v->counter)
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:"ir" (i), "m" (v->counter));
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}
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/**
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* atomic_sub - subtract the atomic variable
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* @i: integer value to subtract
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* @v: pointer of type atomic_t
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*
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* Atomically subtracts @i from @v.
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*/
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static __inline__ void atomic_sub(int i, atomic_t *v)
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{
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__asm__ __volatile__(
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LOCK "subl %1,%0"
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:"=m" (v->counter)
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:"ir" (i), "m" (v->counter));
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}
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/**
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* atomic_sub_and_test - subtract value from variable and test result
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* @i: integer value to subtract
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* @v: pointer of type atomic_t
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*
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* Atomically subtracts @i from @v and returns
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* true if the result is zero, or false for all
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* other cases.
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*/
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static __inline__ int atomic_sub_and_test(int i, atomic_t *v)
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{
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unsigned char c;
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__asm__ __volatile__(
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LOCK "subl %2,%0; sete %1"
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:"=m" (v->counter), "=qm" (c)
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:"ir" (i), "m" (v->counter) : "memory");
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return c;
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}
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/**
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* atomic_inc - increment atomic variable
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* @v: pointer of type atomic_t
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*
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* Atomically increments @v by 1.
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*/
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static __inline__ void atomic_inc(atomic_t *v)
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{
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__asm__ __volatile__(
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LOCK "incl %0"
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:"=m" (v->counter)
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:"m" (v->counter));
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}
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/**
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* atomic_dec - decrement atomic variable
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* @v: pointer of type atomic_t
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*
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* Atomically decrements @v by 1.
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*/
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static __inline__ void atomic_dec(atomic_t *v)
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{
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__asm__ __volatile__(
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LOCK "decl %0"
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:"=m" (v->counter)
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:"m" (v->counter));
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}
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/**
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* atomic_dec_and_test - decrement and test
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* @v: pointer of type atomic_t
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*
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* Atomically decrements @v by 1 and
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* returns true if the result is 0, or false for all other
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* cases.
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*/
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static __inline__ int atomic_dec_and_test(atomic_t *v)
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{
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unsigned char c;
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__asm__ __volatile__(
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LOCK "decl %0; sete %1"
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:"=m" (v->counter), "=qm" (c)
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:"m" (v->counter) : "memory");
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return c != 0;
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}
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/**
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* atomic_inc_and_test - increment and test
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* @v: pointer of type atomic_t
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*
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* Atomically increments @v by 1
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* and returns true if the result is zero, or false for all
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* other cases.
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*/
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static __inline__ int atomic_inc_and_test(atomic_t *v)
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{
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unsigned char c;
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__asm__ __volatile__(
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LOCK "incl %0; sete %1"
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:"=m" (v->counter), "=qm" (c)
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:"m" (v->counter) : "memory");
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return c != 0;
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}
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/**
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* atomic_add_negative - add and test if negative
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* @i: integer value to add
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* @v: pointer of type atomic_t
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*
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* Atomically adds @i to @v and returns true
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* if the result is negative, or false when
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* result is greater than or equal to zero.
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*/
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static __inline__ int atomic_add_negative(int i, atomic_t *v)
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{
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unsigned char c;
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__asm__ __volatile__(
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LOCK "addl %2,%0; sets %1"
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:"=m" (v->counter), "=qm" (c)
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:"ir" (i), "m" (v->counter) : "memory");
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return c;
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}
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/**
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* atomic_add_return - add and return
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* @i: integer value to add
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* @v: pointer of type atomic_t
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*
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* Atomically adds @i to @v and returns @i + @v
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*/
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static __inline__ int atomic_add_return(int i, atomic_t *v)
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{
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int __i = i;
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__asm__ __volatile__(
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LOCK "xaddl %0, %1;"
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:"=r"(i)
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:"m"(v->counter), "0"(i));
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return i + __i;
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}
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static __inline__ int atomic_sub_return(int i, atomic_t *v)
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{
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return atomic_add_return(-i,v);
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}
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#define atomic_inc_return(v) (atomic_add_return(1,v))
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#define atomic_dec_return(v) (atomic_sub_return(1,v))
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/* An 64bit atomic type */
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typedef struct { volatile long counter; } atomic64_t;
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#define ATOMIC64_INIT(i) { (i) }
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/**
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* atomic64_read - read atomic64 variable
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* @v: pointer of type atomic64_t
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*
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* Atomically reads the value of @v.
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* Doesn't imply a read memory barrier.
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*/
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#define atomic64_read(v) ((v)->counter)
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/**
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* atomic64_set - set atomic64 variable
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* @v: pointer to type atomic64_t
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* @i: required value
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*
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* Atomically sets the value of @v to @i.
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*/
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#define atomic64_set(v,i) (((v)->counter) = (i))
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/**
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* atomic64_add - add integer to atomic64 variable
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* @i: integer value to add
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* @v: pointer to type atomic64_t
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*
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* Atomically adds @i to @v.
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*/
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static __inline__ void atomic64_add(long i, atomic64_t *v)
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{
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__asm__ __volatile__(
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LOCK "addq %1,%0"
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:"=m" (v->counter)
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:"ir" (i), "m" (v->counter));
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}
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/**
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* atomic64_sub - subtract the atomic64 variable
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* @i: integer value to subtract
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* @v: pointer to type atomic64_t
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*
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* Atomically subtracts @i from @v.
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*/
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static __inline__ void atomic64_sub(long i, atomic64_t *v)
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{
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__asm__ __volatile__(
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LOCK "subq %1,%0"
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:"=m" (v->counter)
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:"ir" (i), "m" (v->counter));
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}
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/**
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* atomic64_sub_and_test - subtract value from variable and test result
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* @i: integer value to subtract
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* @v: pointer to type atomic64_t
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*
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* Atomically subtracts @i from @v and returns
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* true if the result is zero, or false for all
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* other cases.
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*/
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static __inline__ int atomic64_sub_and_test(long i, atomic64_t *v)
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{
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unsigned char c;
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__asm__ __volatile__(
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LOCK "subq %2,%0; sete %1"
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:"=m" (v->counter), "=qm" (c)
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:"ir" (i), "m" (v->counter) : "memory");
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return c;
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}
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/**
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* atomic64_inc - increment atomic64 variable
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* @v: pointer to type atomic64_t
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*
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* Atomically increments @v by 1.
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*/
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static __inline__ void atomic64_inc(atomic64_t *v)
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{
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__asm__ __volatile__(
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LOCK "incq %0"
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:"=m" (v->counter)
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:"m" (v->counter));
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}
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/**
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* atomic64_dec - decrement atomic64 variable
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* @v: pointer to type atomic64_t
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*
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* Atomically decrements @v by 1.
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*/
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static __inline__ void atomic64_dec(atomic64_t *v)
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{
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__asm__ __volatile__(
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LOCK "decq %0"
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:"=m" (v->counter)
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:"m" (v->counter));
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}
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/**
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* atomic64_dec_and_test - decrement and test
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* @v: pointer to type atomic64_t
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*
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* Atomically decrements @v by 1 and
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* returns true if the result is 0, or false for all other
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* cases.
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*/
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static __inline__ int atomic64_dec_and_test(atomic64_t *v)
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{
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unsigned char c;
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__asm__ __volatile__(
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LOCK "decq %0; sete %1"
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:"=m" (v->counter), "=qm" (c)
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:"m" (v->counter) : "memory");
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return c != 0;
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}
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/**
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* atomic64_inc_and_test - increment and test
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* @v: pointer to type atomic64_t
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*
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* Atomically increments @v by 1
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* and returns true if the result is zero, or false for all
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* other cases.
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*/
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static __inline__ int atomic64_inc_and_test(atomic64_t *v)
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{
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unsigned char c;
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__asm__ __volatile__(
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LOCK "incq %0; sete %1"
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:"=m" (v->counter), "=qm" (c)
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:"m" (v->counter) : "memory");
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return c != 0;
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}
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/**
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* atomic64_add_negative - add and test if negative
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* @i: integer value to add
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* @v: pointer to type atomic64_t
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*
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* Atomically adds @i to @v and returns true
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* if the result is negative, or false when
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* result is greater than or equal to zero.
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*/
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static __inline__ int atomic64_add_negative(long i, atomic64_t *v)
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{
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unsigned char c;
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__asm__ __volatile__(
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LOCK "addq %2,%0; sets %1"
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:"=m" (v->counter), "=qm" (c)
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:"ir" (i), "m" (v->counter) : "memory");
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return c;
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}
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/**
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* atomic64_add_return - add and return
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* @i: integer value to add
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* @v: pointer to type atomic64_t
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*
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* Atomically adds @i to @v and returns @i + @v
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*/
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static __inline__ long atomic64_add_return(long i, atomic64_t *v)
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{
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long __i = i;
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__asm__ __volatile__(
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LOCK "xaddq %0, %1;"
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:"=r"(i)
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:"m"(v->counter), "0"(i));
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return i + __i;
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}
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static __inline__ long atomic64_sub_return(long i, atomic64_t *v)
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{
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return atomic64_add_return(-i,v);
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}
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#define atomic64_inc_return(v) (atomic64_add_return(1,v))
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#define atomic64_dec_return(v) (atomic64_sub_return(1,v))
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#define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))
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#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
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/**
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* atomic_add_unless - add unless the number is a given value
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* @v: pointer of type atomic_t
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* @a: the amount to add to v...
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* @u: ...unless v is equal to u.
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*
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* Atomically adds @a to @v, so long as it was not @u.
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* Returns non-zero if @v was not @u, and zero otherwise.
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*/
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#define atomic_add_unless(v, a, u) \
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({ \
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int c, old; \
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c = atomic_read(v); \
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while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
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c = old; \
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c != (u); \
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})
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#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
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/* These are x86-specific, used by some header files */
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#define atomic_clear_mask(mask, addr) \
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__asm__ __volatile__(LOCK "andl %0,%1" \
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: : "r" (~(mask)),"m" (*addr) : "memory")
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#define atomic_set_mask(mask, addr) \
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__asm__ __volatile__(LOCK "orl %0,%1" \
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: : "r" ((unsigned)mask),"m" (*(addr)) : "memory")
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/* Atomic operations are already serializing on x86 */
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#define smp_mb__before_atomic_dec() barrier()
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#define smp_mb__after_atomic_dec() barrier()
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#define smp_mb__before_atomic_inc() barrier()
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#define smp_mb__after_atomic_inc() barrier()
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#include <asm-generic/atomic.h>
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#endif
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