From 5638f99394d478bcba6384ac7c51e763d1a3a448 Mon Sep 17 00:00:00 2001
From: Harvey Harrison <harvey.harrison@gmail.com>
Date: Wed, 30 Jan 2008 13:31:26 +0100
Subject: [PATCH] x86: unify local_{32|64}.h
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
include/asm-x86/local.h | 244 ++++++++++++++++++++++++++++++++++++-
include/asm-x86/local_32.h | 219 ---------------------------------
include/asm-x86/local_64.h | 207 -------------------------------
3 files changed, 240 insertions(+), 430 deletions(-)
delete mode 100644 include/asm-x86/local_32.h
delete mode 100644 include/asm-x86/local_64.h
diff --git a/include/asm-x86/local.h b/include/asm-x86/local.h
index c7a1b1c66c96..f5677e208601 100644
--- a/include/asm-x86/local.h
+++ b/include/asm-x86/local.h
@@ -1,5 +1,241 @@
-#ifdef CONFIG_X86_32
-# include "local_32.h"
-#else
-# include "local_64.h"
+#ifndef _ARCH_LOCAL_H
+#define _ARCH_LOCAL_H
+
+#include <linux/percpu.h>
+
+#include <asm/system.h>
+#include <asm/atomic.h>
+#include <asm/asm.h>
+
+typedef struct
+{
+ atomic_long_t a;
+} local_t;
+
+#define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) }
+
+#define local_read(l) atomic_long_read(&(l)->a)
+#define local_set(l,i) atomic_long_set(&(l)->a, (i))
+
+static inline void local_inc(local_t *l)
+{
+ __asm__ __volatile__(
+ _ASM_INC "%0"
+ :"+m" (l->a.counter));
+}
+
+static inline void local_dec(local_t *l)
+{
+ __asm__ __volatile__(
+ _ASM_DEC "%0"
+ :"+m" (l->a.counter));
+}
+
+static inline void local_add(long i, local_t *l)
+{
+ __asm__ __volatile__(
+ _ASM_ADD "%1,%0"
+ :"+m" (l->a.counter)
+ :"ir" (i));
+}
+
+static inline void local_sub(long i, local_t *l)
+{
+ __asm__ __volatile__(
+ _ASM_SUB "%1,%0"
+ :"+m" (l->a.counter)
+ :"ir" (i));
+}
+
+/**
+ * local_sub_and_test - subtract value from variable and test result
+ * @i: integer value to subtract
+ * @l: pointer to type local_t
+ *
+ * Atomically subtracts @i from @l and returns
+ * true if the result is zero, or false for all
+ * other cases.
+ */
+static inline int local_sub_and_test(long i, local_t *l)
+{
+ unsigned char c;
+
+ __asm__ __volatile__(
+ _ASM_SUB "%2,%0; sete %1"
+ :"+m" (l->a.counter), "=qm" (c)
+ :"ir" (i) : "memory");
+ return c;
+}
+
+/**
+ * local_dec_and_test - decrement and test
+ * @l: pointer to type local_t
+ *
+ * Atomically decrements @l by 1 and
+ * returns true if the result is 0, or false for all other
+ * cases.
+ */
+static inline int local_dec_and_test(local_t *l)
+{
+ unsigned char c;
+
+ __asm__ __volatile__(
+ _ASM_DEC "%0; sete %1"
+ :"+m" (l->a.counter), "=qm" (c)
+ : : "memory");
+ return c != 0;
+}
+
+/**
+ * local_inc_and_test - increment and test
+ * @l: pointer to type local_t
+ *
+ * Atomically increments @l by 1
+ * and returns true if the result is zero, or false for all
+ * other cases.
+ */
+static inline int local_inc_and_test(local_t *l)
+{
+ unsigned char c;
+
+ __asm__ __volatile__(
+ _ASM_INC "%0; sete %1"
+ :"+m" (l->a.counter), "=qm" (c)
+ : : "memory");
+ return c != 0;
+}
+
+/**
+ * local_add_negative - add and test if negative
+ * @i: integer value to add
+ * @l: pointer to type local_t
+ *
+ * Atomically adds @i to @l and returns true
+ * if the result is negative, or false when
+ * result is greater than or equal to zero.
+ */
+static inline int local_add_negative(long i, local_t *l)
+{
+ unsigned char c;
+
+ __asm__ __volatile__(
+ _ASM_ADD "%2,%0; sets %1"
+ :"+m" (l->a.counter), "=qm" (c)
+ :"ir" (i) : "memory");
+ return c;
+}
+
+/**
+ * local_add_return - add and return
+ * @i: integer value to add
+ * @l: pointer to type local_t
+ *
+ * Atomically adds @i to @l and returns @i + @l
+ */
+static inline long local_add_return(long i, local_t *l)
+{
+ long __i;
+#ifdef CONFIG_M386
+ unsigned long flags;
+ if(unlikely(boot_cpu_data.x86 <= 3))
+ goto no_xadd;
#endif
+ /* Modern 486+ processor */
+ __i = i;
+ __asm__ __volatile__(
+ _ASM_XADD "%0, %1;"
+ :"+r" (i), "+m" (l->a.counter)
+ : : "memory");
+ return i + __i;
+
+#ifdef CONFIG_M386
+no_xadd: /* Legacy 386 processor */
+ local_irq_save(flags);
+ __i = local_read(l);
+ local_set(l, i + __i);
+ local_irq_restore(flags);
+ return i + __i;
+#endif
+}
+
+static inline long local_sub_return(long i, local_t *l)
+{
+ return local_add_return(-i,l);
+}
+
+#define local_inc_return(l) (local_add_return(1,l))
+#define local_dec_return(l) (local_sub_return(1,l))
+
+#define local_cmpxchg(l, o, n) \
+ (cmpxchg_local(&((l)->a.counter), (o), (n)))
+/* Always has a lock prefix */
+#define local_xchg(l, n) (xchg(&((l)->a.counter), (n)))
+
+/**
+ * local_add_unless - add unless the number is a given value
+ * @l: pointer of type local_t
+ * @a: the amount to add to l...
+ * @u: ...unless l is equal to u.
+ *
+ * Atomically adds @a to @l, so long as it was not @u.
+ * Returns non-zero if @l was not @u, and zero otherwise.
+ */
+#define local_add_unless(l, a, u) \
+({ \
+ long c, old; \
+ c = local_read(l); \
+ for (;;) { \
+ if (unlikely(c == (u))) \
+ break; \
+ old = local_cmpxchg((l), c, c + (a)); \
+ if (likely(old == c)) \
+ break; \
+ c = old; \
+ } \
+ c != (u); \
+})
+#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
+
+/* On x86_32, these are no better than the atomic variants.
+ * On x86-64 these are better than the atomic variants on SMP kernels
+ * because they dont use a lock prefix.
+ */
+#define __local_inc(l) local_inc(l)
+#define __local_dec(l) local_dec(l)
+#define __local_add(i,l) local_add((i),(l))
+#define __local_sub(i,l) local_sub((i),(l))
+
+/* Use these for per-cpu local_t variables: on some archs they are
+ * much more efficient than these naive implementations. Note they take
+ * a variable, not an address.
+ *
+ * X86_64: This could be done better if we moved the per cpu data directly
+ * after GS.
+ */
+
+/* Need to disable preemption for the cpu local counters otherwise we could
+ still access a variable of a previous CPU in a non atomic way. */
+#define cpu_local_wrap_v(l) \
+ ({ local_t res__; \
+ preempt_disable(); \
+ res__ = (l); \
+ preempt_enable(); \
+ res__; })
+#define cpu_local_wrap(l) \
+ ({ preempt_disable(); \
+ l; \
+ preempt_enable(); }) \
+
+#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
+#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
+#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
+#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
+#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
+#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
+
+#define __cpu_local_inc(l) cpu_local_inc(l)
+#define __cpu_local_dec(l) cpu_local_dec(l)
+#define __cpu_local_add(i, l) cpu_local_add((i), (l))
+#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
+
+#endif /* _ARCH_LOCAL_H */
diff --git a/include/asm-x86/local_32.h b/include/asm-x86/local_32.h
deleted file mode 100644
index c219fe56b3df..000000000000
--- a/include/asm-x86/local_32.h
+++ /dev/null
@@ -1,219 +0,0 @@
-#ifndef _ARCH_I386_LOCAL_H
-#define _ARCH_I386_LOCAL_H
-
-static inline void local_inc(local_t *l)
-{
- __asm__ __volatile__(
- _ASM_INC "%0"
- :"+m" (l->a.counter));
-}
-
-static inline void local_dec(local_t *l)
-{
- __asm__ __volatile__(
- _ASM_DEC "%0"
- :"+m" (l->a.counter));
-}
-
-static inline void local_add(long i, local_t *l)
-{
- __asm__ __volatile__(
- _ASM_ADD "%1,%0"
- :"+m" (l->a.counter)
- :"ir" (i));
-}
-
-static inline void local_sub(long i, local_t *l)
-{
- __asm__ __volatile__(
- _ASM_SUB "%1,%0"
- :"+m" (l->a.counter)
- :"ir" (i));
-}
-
-/**
- * local_sub_and_test - subtract value from variable and test result
- * @i: integer value to subtract
- * @l: pointer of type local_t
- *
- * Atomically subtracts @i from @l and returns
- * true if the result is zero, or false for all
- * other cases.
- */
-static inline int local_sub_and_test(long i, local_t *l)
-{
- unsigned char c;
-
- __asm__ __volatile__(
- _ASM_SUB "%2,%0; sete %1"
- :"+m" (l->a.counter), "=qm" (c)
- :"ir" (i) : "memory");
- return c;
-}
-
-/**
- * local_dec_and_test - decrement and test
- * @l: pointer of type local_t
- *
- * Atomically decrements @l by 1 and
- * returns true if the result is 0, or false for all other
- * cases.
- */
-static inline int local_dec_and_test(local_t *l)
-{
- unsigned char c;
-
- __asm__ __volatile__(
- _ASM_DEC "%0; sete %1"
- :"+m" (l->a.counter), "=qm" (c)
- : : "memory");
- return c != 0;
-}
-
-/**
- * local_inc_and_test - increment and test
- * @l: pointer of type local_t
- *
- * Atomically increments @l by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
-static inline int local_inc_and_test(local_t *l)
-{
- unsigned char c;
-
- __asm__ __volatile__(
- _ASM_INC "%0; sete %1"
- :"+m" (l->a.counter), "=qm" (c)
- : : "memory");
- return c != 0;
-}
-
-/**
- * local_add_negative - add and test if negative
- * @l: pointer of type local_t
- * @i: integer value to add
- *
- * Atomically adds @i to @l and returns true
- * if the result is negative, or false when
- * result is greater than or equal to zero.
- */
-static inline int local_add_negative(long i, local_t *l)
-{
- unsigned char c;
-
- __asm__ __volatile__(
- _ASM_ADD "%2,%0; sets %1"
- :"+m" (l->a.counter), "=qm" (c)
- :"ir" (i) : "memory");
- return c;
-}
-
-/**
- * local_add_return - add and return
- * @l: pointer of type local_t
- * @i: integer value to add
- *
- * Atomically adds @i to @l and returns @i + @l
- */
-static inline long local_add_return(long i, local_t *l)
-{
- long __i;
-#ifdef CONFIG_M386
- unsigned long flags;
- if(unlikely(boot_cpu_data.x86 <= 3))
- goto no_xadd;
-#endif
- /* Modern 486+ processor */
- __i = i;
- __asm__ __volatile__(
- _ASM_XADD "%0, %1;"
- :"+r" (i), "+m" (l->a.counter)
- : : "memory");
- return i + __i;
-
-#ifdef CONFIG_M386
-no_xadd: /* Legacy 386 processor */
- local_irq_save(flags);
- __i = local_read(l);
- local_set(l, i + __i);
- local_irq_restore(flags);
- return i + __i;
-#endif
-}
-
-static inline long local_sub_return(long i, local_t *l)
-{
- return local_add_return(-i,l);
-}
-
-#define local_inc_return(l) (local_add_return(1,l))
-#define local_dec_return(l) (local_sub_return(1,l))
-
-#define local_cmpxchg(l, o, n) \
- (cmpxchg_local(&((l)->a.counter), (o), (n)))
-/* Always has a lock prefix */
-#define local_xchg(l, n) (xchg(&((l)->a.counter), (n)))
-
-/**
- * local_add_unless - add unless the number is a given value
- * @l: pointer of type local_t
- * @a: the amount to add to l...
- * @u: ...unless l is equal to u.
- *
- * Atomically adds @a to @l, so long as it was not @u.
- * Returns non-zero if @l was not @u, and zero otherwise.
- */
-#define local_add_unless(l, a, u) \
-({ \
- long c, old; \
- c = local_read(l); \
- for (;;) { \
- if (unlikely(c == (u))) \
- break; \
- old = local_cmpxchg((l), c, c + (a)); \
- if (likely(old == c)) \
- break; \
- c = old; \
- } \
- c != (u); \
-})
-#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
-
-/* On x86, these are no better than the atomic variants. */
-#define __local_inc(l) local_inc(l)
-#define __local_dec(l) local_dec(l)
-#define __local_add(i,l) local_add((i),(l))
-#define __local_sub(i,l) local_sub((i),(l))
-
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable, not an address.
- */
-
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
-#endif /* _ARCH_I386_LOCAL_H */
diff --git a/include/asm-x86/local_64.h b/include/asm-x86/local_64.h
deleted file mode 100644
index d685cd7e014f..000000000000
--- a/include/asm-x86/local_64.h
+++ /dev/null
@@ -1,207 +0,0 @@
-#ifndef _ARCH_X8664_LOCAL_H
-#define _ARCH_X8664_LOCAL_H
-
-static inline void local_inc(local_t *l)
-{
- __asm__ __volatile__(
- _ASM_INC "%0"
- :"+m" (l->a.counter));
-}
-
-static inline void local_dec(local_t *l)
-{
- __asm__ __volatile__(
- _ASM_DEC "%0"
- :"+m" (l->a.counter));
-}
-
-static inline void local_add(long i, local_t *l)
-{
- __asm__ __volatile__(
- _ASM_ADD "%1,%0"
- :"+m" (l->a.counter)
- :"ir" (i));
-}
-
-static inline void local_sub(long i, local_t *l)
-{
- __asm__ __volatile__(
- _ASM_SUB "%1,%0"
- :"+m" (l->a.counter)
- :"ir" (i));
-}
-
-/**
- * local_sub_and_test - subtract value from variable and test result
- * @i: integer value to subtract
- * @l: pointer to type local_t
- *
- * Atomically subtracts @i from @l and returns
- * true if the result is zero, or false for all
- * other cases.
- */
-static inline int local_sub_and_test(long i, local_t *l)
-{
- unsigned char c;
-
- __asm__ __volatile__(
- _ASM_SUB "%2,%0; sete %1"
- :"+m" (l->a.counter), "=qm" (c)
- :"ir" (i) : "memory");
- return c;
-}
-
-/**
- * local_dec_and_test - decrement and test
- * @l: pointer to type local_t
- *
- * Atomically decrements @l by 1 and
- * returns true if the result is 0, or false for all other
- * cases.
- */
-static inline int local_dec_and_test(local_t *l)
-{
- unsigned char c;
-
- __asm__ __volatile__(
- _ASM_DEC "%0; sete %1"
- :"+m" (l->a.counter), "=qm" (c)
- : : "memory");
- return c != 0;
-}
-
-/**
- * local_inc_and_test - increment and test
- * @l: pointer to type local_t
- *
- * Atomically increments @l by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
-static inline int local_inc_and_test(local_t *l)
-{
- unsigned char c;
-
- __asm__ __volatile__(
- _ASM_INC "%0; sete %1"
- :"+m" (l->a.counter), "=qm" (c)
- : : "memory");
- return c != 0;
-}
-
-/**
- * local_add_negative - add and test if negative
- * @i: integer value to add
- * @l: pointer to type local_t
- *
- * Atomically adds @i to @l and returns true
- * if the result is negative, or false when
- * result is greater than or equal to zero.
- */
-static inline int local_add_negative(long i, local_t *l)
-{
- unsigned char c;
-
- __asm__ __volatile__(
- _ASM_ADD "%2,%0; sets %1"
- :"+m" (l->a.counter), "=qm" (c)
- :"ir" (i) : "memory");
- return c;
-}
-
-/**
- * local_add_return - add and return
- * @i: integer value to add
- * @l: pointer to type local_t
- *
- * Atomically adds @i to @l and returns @i + @l
- */
-static inline long local_add_return(long i, local_t *l)
-{
- long __i = i;
- __asm__ __volatile__(
- _ASM_XADD "%0, %1;"
- :"+r" (i), "+m" (l->a.counter)
- : : "memory");
- return i + __i;
-}
-
-static inline long local_sub_return(long i, local_t *l)
-{
- return local_add_return(-i,l);
-}
-
-#define local_inc_return(l) (local_add_return(1,l))
-#define local_dec_return(l) (local_sub_return(1,l))
-
-#define local_cmpxchg(l, o, n) \
- (cmpxchg_local(&((l)->a.counter), (o), (n)))
-/* Always has a lock prefix */
-#define local_xchg(l, n) (xchg(&((l)->a.counter), (n)))
-
-/**
- * atomic_up_add_unless - add unless the number is a given value
- * @l: pointer of type local_t
- * @a: the amount to add to l...
- * @u: ...unless l is equal to u.
- *
- * Atomically adds @a to @l, so long as it was not @u.
- * Returns non-zero if @l was not @u, and zero otherwise.
- */
-#define local_add_unless(l, a, u) \
-({ \
- long c, old; \
- c = local_read(l); \
- for (;;) { \
- if (unlikely(c == (u))) \
- break; \
- old = local_cmpxchg((l), c, c + (a)); \
- if (likely(old == c)) \
- break; \
- c = old; \
- } \
- c != (u); \
-})
-#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
-
-/* On x86-64 these are better than the atomic variants on SMP kernels
- because they dont use a lock prefix. */
-#define __local_inc(l) local_inc(l)
-#define __local_dec(l) local_dec(l)
-#define __local_add(i,l) local_add((i),(l))
-#define __local_sub(i,l) local_sub((i),(l))
-
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable, not an address.
- *
- * This could be done better if we moved the per cpu data directly
- * after GS.
- */
-
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
-#endif /* _ARCH_X8664_LOCAL_H */
--
2.20.1