Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 183 insertions, 0 deletions

diff --git a/include/asm-ia64/atomic.h b/include/asm-ia64/atomic.h
new file mode 100644
index 000000000000..874a6f890e75
--- /dev/null
+++ b/include/asm-ia64/atomic.h
@@ -0,0 +1,183 @@
+#ifndef _ASM_IA64_ATOMIC_H
+#define _ASM_IA64_ATOMIC_H
+
+/*
+ * Atomic operations that C can't guarantee us.  Useful for
+ * resource counting etc..
+ *
+ * NOTE: don't mess with the types below!  The "unsigned long" and
+ * "int" types were carefully placed so as to ensure proper operation
+ * of the macros.
+ *
+ * Copyright (C) 1998, 1999, 2002-2003 Hewlett-Packard Co
+ *      David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+#include <linux/types.h>
+
+#include <asm/intrinsics.h>
+
+/*
+ * On IA-64, counter must always be volatile to ensure that that the
+ * memory accesses are ordered.
+ */
+typedef struct { volatile __s32 counter; } atomic_t;
+typedef struct { volatile __s64 counter; } atomic64_t;
+
+#define ATOMIC_INIT(i)          ((atomic_t) { (i) })
+#define ATOMIC64_INIT(i)        ((atomic64_t) { (i) })
+
+#define atomic_read(v)          ((v)->counter)
+#define atomic64_read(v)        ((v)->counter)
+
+#define atomic_set(v,i)         (((v)->counter) = (i))
+#define atomic64_set(v,i)       (((v)->counter) = (i))
+
+static __inline__ int
+ia64_atomic_add (int i, atomic_t *v)
+{
+        __s32 old, new;
+        CMPXCHG_BUGCHECK_DECL
+
+        do {
+                CMPXCHG_BUGCHECK(v);
+                old = atomic_read(v);
+                new = old + i;
+        } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old);
+        return new;
+}
+
+static __inline__ int
+ia64_atomic64_add (__s64 i, atomic64_t *v)
+{
+        __s64 old, new;
+        CMPXCHG_BUGCHECK_DECL
+
+        do {
+                CMPXCHG_BUGCHECK(v);
+                old = atomic_read(v);
+                new = old + i;
+        } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);
+        return new;
+}
+
+static __inline__ int
+ia64_atomic_sub (int i, atomic_t *v)
+{
+        __s32 old, new;
+        CMPXCHG_BUGCHECK_DECL
+
+        do {
+                CMPXCHG_BUGCHECK(v);
+                old = atomic_read(v);
+                new = old - i;
+        } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old);
+        return new;
+}
+
+static __inline__ int
+ia64_atomic64_sub (__s64 i, atomic64_t *v)
+{
+        __s64 old, new;
+        CMPXCHG_BUGCHECK_DECL
+
+        do {
+                CMPXCHG_BUGCHECK(v);
+                old = atomic_read(v);
+                new = old - i;
+        } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);
+        return new;
+}
+
+#define atomic_add_return(i,v)                                          \
+({                                                                      \
+        int __ia64_aar_i = (i);                                         \
+        (__builtin_constant_p(i)                                        \
+         && (   (__ia64_aar_i ==  1) || (__ia64_aar_i ==   4)           \
+             || (__ia64_aar_i ==  8) || (__ia64_aar_i ==  16)           \
+             || (__ia64_aar_i == -1) || (__ia64_aar_i ==  -4)           \
+             || (__ia64_aar_i == -8) || (__ia64_aar_i == -16)))         \
+                ? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter)       \
+                : ia64_atomic_add(__ia64_aar_i, v);                     \
+})
+
+#define atomic64_add_return(i,v)                                        \
+({                                                                      \
+        long __ia64_aar_i = (i);                                        \
+        (__builtin_constant_p(i)                                        \
+         && (   (__ia64_aar_i ==  1) || (__ia64_aar_i ==   4)           \
+             || (__ia64_aar_i ==  8) || (__ia64_aar_i ==  16)           \
+             || (__ia64_aar_i == -1) || (__ia64_aar_i ==  -4)           \
+             || (__ia64_aar_i == -8) || (__ia64_aar_i == -16)))         \
+                ? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter)       \
+                : ia64_atomic64_add(__ia64_aar_i, v);                   \
+})
+
+/*
+ * Atomically add I to V and return TRUE if the resulting value is
+ * negative.
+ */
+static __inline__ int
+atomic_add_negative (int i, atomic_t *v)
+{
+        return atomic_add_return(i, v) < 0;
+}
+
+static __inline__ int
+atomic64_add_negative (__s64 i, atomic64_t *v)
+{
+        return atomic64_add_return(i, v) < 0;
+}
+
+#define atomic_sub_return(i,v)                                          \
+({                                                                      \
+        int __ia64_asr_i = (i);                                         \
+        (__builtin_constant_p(i)                                        \
+         && (   (__ia64_asr_i ==   1) || (__ia64_asr_i ==   4)          \
+             || (__ia64_asr_i ==   8) || (__ia64_asr_i ==  16)          \
+             || (__ia64_asr_i ==  -1) || (__ia64_asr_i ==  -4)          \
+             || (__ia64_asr_i ==  -8) || (__ia64_asr_i == -16)))        \
+                ? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter)      \
+                : ia64_atomic_sub(__ia64_asr_i, v);                     \
+})
+
+#define atomic64_sub_return(i,v)                                        \
+({                                                                      \
+        long __ia64_asr_i = (i);                                        \
+        (__builtin_constant_p(i)                                        \
+         && (   (__ia64_asr_i ==   1) || (__ia64_asr_i ==   4)          \
+             || (__ia64_asr_i ==   8) || (__ia64_asr_i ==  16)          \
+             || (__ia64_asr_i ==  -1) || (__ia64_asr_i ==  -4)          \
+             || (__ia64_asr_i ==  -8) || (__ia64_asr_i == -16)))        \
+                ? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter)      \
+                : ia64_atomic64_sub(__ia64_asr_i, v);                   \
+})
+
+#define atomic_dec_return(v)            atomic_sub_return(1, (v))
+#define atomic_inc_return(v)            atomic_add_return(1, (v))
+#define atomic64_dec_return(v)          atomic64_sub_return(1, (v))
+#define atomic64_inc_return(v)          atomic64_add_return(1, (v))
+
+#define atomic_sub_and_test(i,v)        (atomic_sub_return((i), (v)) == 0)
+#define atomic_dec_and_test(v)          (atomic_sub_return(1, (v)) == 0)
+#define atomic_inc_and_test(v)          (atomic_add_return(1, (v)) == 0)
+#define atomic64_sub_and_test(i,v)      (atomic64_sub_return((i), (v)) == 0)
+#define atomic64_dec_and_test(v)        (atomic64_sub_return(1, (v)) == 0)
+#define atomic64_inc_and_test(v)        (atomic64_add_return(1, (v)) == 0)
+
+#define atomic_add(i,v)                 atomic_add_return((i), (v))
+#define atomic_sub(i,v)                 atomic_sub_return((i), (v))
+#define atomic_inc(v)                   atomic_add(1, (v))
+#define atomic_dec(v)                   atomic_sub(1, (v))
+
+#define atomic64_add(i,v)               atomic64_add_return((i), (v))
+#define atomic64_sub(i,v)               atomic64_sub_return((i), (v))
+#define atomic64_inc(v)                 atomic64_add(1, (v))
+#define atomic64_dec(v)                 atomic64_sub(1, (v))
+
+/* Atomic operations are already serializing */
+#define smp_mb__before_atomic_dec()     barrier()
+#define smp_mb__after_atomic_dec()      barrier()
+#define smp_mb__before_atomic_inc()     barrier()
+#define smp_mb__after_atomic_inc()      barrier()
+
+#endif /* _ASM_IA64_ATOMIC_H */