Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5638f99394d478bcba6384ac7c51e763d1a3a448
Commit:     5638f99394d478bcba6384ac7c51e763d1a3a448
Parent:     8ee5797a91bdb713b4031741b33bd035f9c43870
Author:     Harvey Harrison <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:31:26 2008 +0100
Committer:  Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:31:26 2008 +0100

    x86: unify local_{32|64}.h
    
    Signed-off-by: Harvey Harrison <[EMAIL PROTECTED]>
    Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
    Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
 include/asm-x86/local.h    |  246 +++++++++++++++++++++++++++++++++++++++++++-
 include/asm-x86/local_32.h |  219 ---------------------------------------
 include/asm-x86/local_64.h |  207 -------------------------------------
 3 files changed, 241 insertions(+), 431 deletions(-)

diff --git a/include/asm-x86/local.h b/include/asm-x86/local.h
dissimilarity index 91%
index c7a1b1c..f5677e2 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"
-#endif
+#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 c219fe5..0000000
--- 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 d685cd7..0000000
--- 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 */
-
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