The patches following this one will add preemption checks to __this_cpu
ops so we need to have an alternative way to use this_cpu operations
without preemption checks.
raw_cpu_ops will be the basis for all other ops since these will be the
operations that do not implement any checks.
Primitive operations are renamed by this patch from __this_cpu_xxx to
raw_cpu_xxxx.
Also change the uses of the x86 percpu primitives in preempt.h.
These depend directly on asm/percpu.h (header #include nesting issue).
V1->V2:
- move __this_cpu_ptr legacy definition to include/asm-generic/percpu.h
- Merge formerly separate x86 pieces because some x86 code in preempt.h
relies on __this_cpu_ops/raw_cpu_ops to not fall back.
Acked-by: Ingo Molnar <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux/include/linux/percpu.h
===================================================================
--- linux.orig/include/linux/percpu.h 2014-01-30 14:40:36.186810863 -0600
+++ linux/include/linux/percpu.h 2014-01-30 14:40:36.186810863 -0600
@@ -243,6 +243,8 @@
} while (0)
/*
+ * this_cpu operations (C) 2008-2013 Christoph Lameter <[email protected]>
+ *
* Optimized manipulation for memory allocated through the per cpu
* allocator or for addresses of per cpu variables.
*
@@ -296,7 +298,7 @@
do { \
unsigned long flags; \
raw_local_irq_save(flags); \
- *__this_cpu_ptr(&(pcp)) op val; \
+ *raw_cpu_ptr(&(pcp)) op val; \
raw_local_irq_restore(flags); \
} while (0)
@@ -381,8 +383,8 @@
typeof(pcp) ret__; \
unsigned long flags; \
raw_local_irq_save(flags); \
- __this_cpu_add(pcp, val); \
- ret__ = __this_cpu_read(pcp); \
+ raw_cpu_add(pcp, val); \
+ ret__ = raw_cpu_read(pcp); \
raw_local_irq_restore(flags); \
ret__; \
})
@@ -411,8 +413,8 @@
({ typeof(pcp) ret__; \
unsigned long flags; \
raw_local_irq_save(flags); \
- ret__ = __this_cpu_read(pcp); \
- __this_cpu_write(pcp, nval); \
+ ret__ = raw_cpu_read(pcp); \
+ raw_cpu_write(pcp, nval); \
raw_local_irq_restore(flags); \
ret__; \
})
@@ -439,9 +441,9 @@
typeof(pcp) ret__; \
unsigned long flags; \
raw_local_irq_save(flags); \
- ret__ = __this_cpu_read(pcp); \
+ ret__ = raw_cpu_read(pcp); \
if (ret__ == (oval)) \
- __this_cpu_write(pcp, nval); \
+ raw_cpu_write(pcp, nval); \
raw_local_irq_restore(flags); \
ret__; \
})
@@ -476,7 +478,7 @@
int ret__; \
unsigned long flags; \
raw_local_irq_save(flags); \
- ret__ = __this_cpu_generic_cmpxchg_double(pcp1, pcp2, \
+ ret__ = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \
oval1, oval2, nval1, nval2); \
raw_local_irq_restore(flags); \
ret__; \
@@ -504,12 +506,8 @@
#endif
/*
- * Generic percpu operations for context that are safe from preemption/interrupts.
- * Either we do not care about races or the caller has the
- * responsibility of handling preemption/interrupt issues. Arch code can still
- * override these instructions since the arch per cpu code may be more
- * efficient and may actually get race freeness for free (that is the
- * case for x86 for example).
+ * Generic percpu operations for contexts where we do not want to do
+ * any checks for preemptiosn.
*
* If there is no other protection through preempt disable and/or
* disabling interupts then one of these RMW operations can show unexpected
@@ -517,211 +515,272 @@
* or an interrupt occurred and the same percpu variable was modified from
* the interrupt context.
*/
-#ifndef __this_cpu_read
-# ifndef __this_cpu_read_1
-# define __this_cpu_read_1(pcp) (*__this_cpu_ptr(&(pcp)))
+#ifndef raw_cpu_read
+# ifndef raw_cpu_read_1
+# define raw_cpu_read_1(pcp) (*raw_cpu_ptr(&(pcp)))
# endif
-# ifndef __this_cpu_read_2
-# define __this_cpu_read_2(pcp) (*__this_cpu_ptr(&(pcp)))
+# ifndef raw_cpu_read_2
+# define raw_cpu_read_2(pcp) (*raw_cpu_ptr(&(pcp)))
# endif
-# ifndef __this_cpu_read_4
-# define __this_cpu_read_4(pcp) (*__this_cpu_ptr(&(pcp)))
+# ifndef raw_cpu_read_4
+# define raw_cpu_read_4(pcp) (*raw_cpu_ptr(&(pcp)))
# endif
-# ifndef __this_cpu_read_8
-# define __this_cpu_read_8(pcp) (*__this_cpu_ptr(&(pcp)))
+# ifndef raw_cpu_read_8
+# define raw_cpu_read_8(pcp) (*raw_cpu_ptr(&(pcp)))
# endif
-# define __this_cpu_read(pcp) __pcpu_size_call_return(__this_cpu_read_, (pcp))
+# define raw_cpu_read(pcp) __pcpu_size_call_return(raw_cpu_read_, (pcp))
#endif
-#define __this_cpu_generic_to_op(pcp, val, op) \
+#define raw_cpu_generic_to_op(pcp, val, op) \
do { \
- *__this_cpu_ptr(&(pcp)) op val; \
+ *raw_cpu_ptr(&(pcp)) op val; \
} while (0)
-#ifndef __this_cpu_write
-# ifndef __this_cpu_write_1
-# define __this_cpu_write_1(pcp, val) __this_cpu_generic_to_op((pcp), (val), =)
+
+#ifndef raw_cpu_write
+# ifndef raw_cpu_write_1
+# define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op((pcp), (val), =)
# endif
-# ifndef __this_cpu_write_2
-# define __this_cpu_write_2(pcp, val) __this_cpu_generic_to_op((pcp), (val), =)
+# ifndef raw_cpu_write_2
+# define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op((pcp), (val), =)
# endif
-# ifndef __this_cpu_write_4
-# define __this_cpu_write_4(pcp, val) __this_cpu_generic_to_op((pcp), (val), =)
+# ifndef raw_cpu_write_4
+# define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op((pcp), (val), =)
# endif
-# ifndef __this_cpu_write_8
-# define __this_cpu_write_8(pcp, val) __this_cpu_generic_to_op((pcp), (val), =)
+# ifndef raw_cpu_write_8
+# define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op((pcp), (val), =)
# endif
-# define __this_cpu_write(pcp, val) __pcpu_size_call(__this_cpu_write_, (pcp), (val))
+# define raw_cpu_write(pcp, val) __pcpu_size_call(raw_cpu_write_, (pcp), (val))
#endif
-#ifndef __this_cpu_add
-# ifndef __this_cpu_add_1
-# define __this_cpu_add_1(pcp, val) __this_cpu_generic_to_op((pcp), (val), +=)
+#ifndef raw_cpu_add
+# ifndef raw_cpu_add_1
+# define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op((pcp), (val), +=)
# endif
-# ifndef __this_cpu_add_2
-# define __this_cpu_add_2(pcp, val) __this_cpu_generic_to_op((pcp), (val), +=)
+# ifndef raw_cpu_add_2
+# define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op((pcp), (val), +=)
# endif
-# ifndef __this_cpu_add_4
-# define __this_cpu_add_4(pcp, val) __this_cpu_generic_to_op((pcp), (val), +=)
+# ifndef raw_cpu_add_4
+# define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op((pcp), (val), +=)
# endif
-# ifndef __this_cpu_add_8
-# define __this_cpu_add_8(pcp, val) __this_cpu_generic_to_op((pcp), (val), +=)
+# ifndef raw_cpu_add_8
+# define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op((pcp), (val), +=)
# endif
-# define __this_cpu_add(pcp, val) __pcpu_size_call(__this_cpu_add_, (pcp), (val))
+# define raw_cpu_add(pcp, val) __pcpu_size_call(raw_cpu_add_, (pcp), (val))
#endif
-#ifndef __this_cpu_sub
-# define __this_cpu_sub(pcp, val) __this_cpu_add((pcp), -(typeof(pcp))(val))
+#ifndef raw_cpu_sub
+# define raw_cpu_sub(pcp, val) raw_cpu_add((pcp), -(val))
#endif
-#ifndef __this_cpu_inc
-# define __this_cpu_inc(pcp) __this_cpu_add((pcp), 1)
+#ifndef raw_cpu_inc
+# define raw_cpu_inc(pcp) raw_cpu_add((pcp), 1)
#endif
-#ifndef __this_cpu_dec
-# define __this_cpu_dec(pcp) __this_cpu_sub((pcp), 1)
+#ifndef raw_cpu_dec
+# define raw_cpu_dec(pcp) raw_cpu_sub((pcp), 1)
#endif
-#ifndef __this_cpu_and
-# ifndef __this_cpu_and_1
-# define __this_cpu_and_1(pcp, val) __this_cpu_generic_to_op((pcp), (val), &=)
+#ifndef raw_cpu_and
+# ifndef raw_cpu_and_1
+# define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op((pcp), (val), &=)
# endif
-# ifndef __this_cpu_and_2
-# define __this_cpu_and_2(pcp, val) __this_cpu_generic_to_op((pcp), (val), &=)
+# ifndef raw_cpu_and_2
+# define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op((pcp), (val), &=)
# endif
-# ifndef __this_cpu_and_4
-# define __this_cpu_and_4(pcp, val) __this_cpu_generic_to_op((pcp), (val), &=)
+# ifndef raw_cpu_and_4
+# define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op((pcp), (val), &=)
# endif
-# ifndef __this_cpu_and_8
-# define __this_cpu_and_8(pcp, val) __this_cpu_generic_to_op((pcp), (val), &=)
+# ifndef raw_cpu_and_8
+# define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op((pcp), (val), &=)
# endif
-# define __this_cpu_and(pcp, val) __pcpu_size_call(__this_cpu_and_, (pcp), (val))
+# define raw_cpu_and(pcp, val) __pcpu_size_call(raw_cpu_and_, (pcp), (val))
#endif
-#ifndef __this_cpu_or
-# ifndef __this_cpu_or_1
-# define __this_cpu_or_1(pcp, val) __this_cpu_generic_to_op((pcp), (val), |=)
+#ifndef raw_cpu_or
+# ifndef raw_cpu_or_1
+# define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op((pcp), (val), |=)
# endif
-# ifndef __this_cpu_or_2
-# define __this_cpu_or_2(pcp, val) __this_cpu_generic_to_op((pcp), (val), |=)
+# ifndef raw_cpu_or_2
+# define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op((pcp), (val), |=)
# endif
-# ifndef __this_cpu_or_4
-# define __this_cpu_or_4(pcp, val) __this_cpu_generic_to_op((pcp), (val), |=)
+# ifndef raw_cpu_or_4
+# define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op((pcp), (val), |=)
# endif
-# ifndef __this_cpu_or_8
-# define __this_cpu_or_8(pcp, val) __this_cpu_generic_to_op((pcp), (val), |=)
+# ifndef raw_cpu_or_8
+# define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op((pcp), (val), |=)
# endif
-# define __this_cpu_or(pcp, val) __pcpu_size_call(__this_cpu_or_, (pcp), (val))
+# define raw_cpu_or(pcp, val) __pcpu_size_call(raw_cpu_or_, (pcp), (val))
#endif
-#define __this_cpu_generic_add_return(pcp, val) \
+#define raw_cpu_generic_add_return(pcp, val) \
({ \
- __this_cpu_add(pcp, val); \
- __this_cpu_read(pcp); \
+ raw_cpu_add(pcp, val); \
+ raw_cpu_read(pcp); \
})
-#ifndef __this_cpu_add_return
-# ifndef __this_cpu_add_return_1
-# define __this_cpu_add_return_1(pcp, val) __this_cpu_generic_add_return(pcp, val)
+#ifndef raw_cpu_add_return
+# ifndef raw_cpu_add_return_1
+# define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val)
# endif
-# ifndef __this_cpu_add_return_2
-# define __this_cpu_add_return_2(pcp, val) __this_cpu_generic_add_return(pcp, val)
+# ifndef raw_cpu_add_return_2
+# define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val)
# endif
-# ifndef __this_cpu_add_return_4
-# define __this_cpu_add_return_4(pcp, val) __this_cpu_generic_add_return(pcp, val)
+# ifndef raw_cpu_add_return_4
+# define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val)
# endif
-# ifndef __this_cpu_add_return_8
-# define __this_cpu_add_return_8(pcp, val) __this_cpu_generic_add_return(pcp, val)
+# ifndef raw_cpu_add_return_8
+# define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val)
# endif
-# define __this_cpu_add_return(pcp, val) \
- __pcpu_size_call_return2(__this_cpu_add_return_, pcp, val)
+# define raw_cpu_add_return(pcp, val) \
+ __pcpu_size_call_return2(raw_add_return_, pcp, val)
#endif
-#define __this_cpu_sub_return(pcp, val) __this_cpu_add_return(pcp, -(typeof(pcp))(val))
-#define __this_cpu_inc_return(pcp) __this_cpu_add_return(pcp, 1)
-#define __this_cpu_dec_return(pcp) __this_cpu_add_return(pcp, -1)
+#define raw_cpu_sub_return(pcp, val) raw_cpu_add_return(pcp, -(typeof(pcp))(val))
+#define raw_cpu_inc_return(pcp) raw_cpu_add_return(pcp, 1)
+#define raw_cpu_dec_return(pcp) raw_cpu_add_return(pcp, -1)
-#define __this_cpu_generic_xchg(pcp, nval) \
+#define raw_cpu_generic_xchg(pcp, nval) \
({ typeof(pcp) ret__; \
- ret__ = __this_cpu_read(pcp); \
- __this_cpu_write(pcp, nval); \
+ ret__ = raw_cpu_read(pcp); \
+ raw_cpu_write(pcp, nval); \
ret__; \
})
-#ifndef __this_cpu_xchg
-# ifndef __this_cpu_xchg_1
-# define __this_cpu_xchg_1(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
+#ifndef raw_cpu_xchg
+# ifndef raw_cpu_xchg_1
+# define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
# endif
-# ifndef __this_cpu_xchg_2
-# define __this_cpu_xchg_2(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
+# ifndef raw_cpu_xchg_2
+# define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
# endif
-# ifndef __this_cpu_xchg_4
-# define __this_cpu_xchg_4(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
+# ifndef raw_cpu_xchg_4
+# define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
# endif
-# ifndef __this_cpu_xchg_8
-# define __this_cpu_xchg_8(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
+# ifndef raw_cpu_xchg_8
+# define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
# endif
-# define __this_cpu_xchg(pcp, nval) \
- __pcpu_size_call_return2(__this_cpu_xchg_, (pcp), nval)
+# define raw_cpu_xchg(pcp, nval) \
+ __pcpu_size_call_return2(raw_cpu_xchg_, (pcp), nval)
#endif
-#define __this_cpu_generic_cmpxchg(pcp, oval, nval) \
+#define raw_cpu_generic_cmpxchg(pcp, oval, nval) \
({ \
typeof(pcp) ret__; \
- ret__ = __this_cpu_read(pcp); \
+ ret__ = raw_cpu_read(pcp); \
if (ret__ == (oval)) \
- __this_cpu_write(pcp, nval); \
+ raw_cpu_write(pcp, nval); \
ret__; \
})
-#ifndef __this_cpu_cmpxchg
-# ifndef __this_cpu_cmpxchg_1
-# define __this_cpu_cmpxchg_1(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
+#ifndef raw_cpu_cmpxchg
+# ifndef raw_cpu_cmpxchg_1
+# define raw_cpu_cmpxchg_1(pcp, oval, nval) raw_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
-# ifndef __this_cpu_cmpxchg_2
-# define __this_cpu_cmpxchg_2(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
+# ifndef raw_cpu_cmpxchg_2
+# define raw_cpu_cmpxchg_2(pcp, oval, nval) raw_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
-# ifndef __this_cpu_cmpxchg_4
-# define __this_cpu_cmpxchg_4(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
+# ifndef raw_cpu_cmpxchg_4
+# define raw_cpu_cmpxchg_4(pcp, oval, nval) raw_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
-# ifndef __this_cpu_cmpxchg_8
-# define __this_cpu_cmpxchg_8(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
+# ifndef raw_cpu_cmpxchg_8
+# define raw_cpu_cmpxchg_8(pcp, oval, nval) raw_cpu_generic_cmpxchg(pcp, oval, nval)
# endif
-# define __this_cpu_cmpxchg(pcp, oval, nval) \
- __pcpu_size_call_return2(__this_cpu_cmpxchg_, pcp, oval, nval)
+# define raw_cpu_cmpxchg(pcp, oval, nval) \
+ __pcpu_size_call_return2(raw_cpu_cmpxchg_, pcp, oval, nval)
#endif
-#define __this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
+#define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
({ \
int __ret = 0; \
- if (__this_cpu_read(pcp1) == (oval1) && \
- __this_cpu_read(pcp2) == (oval2)) { \
- __this_cpu_write(pcp1, (nval1)); \
- __this_cpu_write(pcp2, (nval2)); \
+ if (raw_cpu_read(pcp1) == (oval1) && \
+ raw_cpu_read(pcp2) == (oval2)) { \
+ raw_cpu_write(pcp1, (nval1)); \
+ raw_cpu_write(pcp2, (nval2)); \
__ret = 1; \
} \
(__ret); \
})
-#ifndef __this_cpu_cmpxchg_double
-# ifndef __this_cpu_cmpxchg_double_1
-# define __this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- __this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-# endif
-# ifndef __this_cpu_cmpxchg_double_2
-# define __this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- __this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-# endif
-# ifndef __this_cpu_cmpxchg_double_4
-# define __this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- __this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-# endif
-# ifndef __this_cpu_cmpxchg_double_8
-# define __this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- __this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
+#ifndef raw_cpu_cmpxchg_double
+# ifndef raw_cpu_cmpxchg_double_1
+# define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
+ raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
+# endif
+# ifndef raw_cpu_cmpxchg_double_2
+# define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
+ raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
+# endif
+# ifndef raw_cpu_cmpxchg_double_4
+# define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
+ raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
+# endif
+# ifndef raw_cpu_cmpxchg_double_8
+# define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
+ raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
# endif
+# define raw_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
+ __pcpu_double_call_return_bool(raw_cpu_cmpxchg_double_, (pcp1), (pcp2), (oval1), (oval2), (nval1), (nval2))
+#endif
+
+/*
+ * Generic percpu operations for context that are safe from preemption/interrupts.
+ * Checks will be added here soon.
+ */
+#ifndef __this_cpu_read
+# define __this_cpu_read(pcp) __pcpu_size_call_return(raw_cpu_read_, (pcp))
+#endif
+
+#ifndef __this_cpu_write
+# define __this_cpu_write(pcp, val) __pcpu_size_call(raw_cpu_write_, (pcp), (val))
+#endif
+
+#ifndef __this_cpu_add
+# define __this_cpu_add(pcp, val) __pcpu_size_call(raw_cpu_add_, (pcp), (val))
+#endif
+
+#ifndef __this_cpu_sub
+# define __this_cpu_sub(pcp, val) __this_cpu_add((pcp), -(typeof(pcp))(val))
+#endif
+
+#ifndef __this_cpu_inc
+# define __this_cpu_inc(pcp) __this_cpu_add((pcp), 1)
+#endif
+
+#ifndef __this_cpu_dec
+# define __this_cpu_dec(pcp) __this_cpu_sub((pcp), 1)
+#endif
+
+#ifndef __this_cpu_and
+# define __this_cpu_and(pcp, val) __pcpu_size_call(raw_cpu_and_, (pcp), (val))
+#endif
+
+#ifndef __this_cpu_or
+# define __this_cpu_or(pcp, val) __pcpu_size_call(raw_cpu_or_, (pcp), (val))
+#endif
+
+#ifndef __this_cpu_add_return
+# define __this_cpu_add_return(pcp, val) \
+ __pcpu_size_call_return2(raw_cpu_add_return_, pcp, val)
+#endif
+
+#define __this_cpu_sub_return(pcp, val) __this_cpu_add_return(pcp, -(typeof(pcp))(val))
+#define __this_cpu_inc_return(pcp) __this_cpu_add_return(pcp, 1)
+#define __this_cpu_dec_return(pcp) __this_cpu_add_return(pcp, -1)
+
+#ifndef __this_cpu_xchg
+# define __this_cpu_xchg(pcp, nval) \
+ __pcpu_size_call_return2(raw_cpu_xchg_, (pcp), nval)
+#endif
+
+#ifndef __this_cpu_cmpxchg
+# define __this_cpu_cmpxchg(pcp, oval, nval) \
+ __pcpu_size_call_return2(raw_cpu_cmpxchg_, pcp, oval, nval)
+#endif
+
+#ifndef __this_cpu_cmpxchg_double
# define __this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- __pcpu_double_call_return_bool(__this_cpu_cmpxchg_double_, (pcp1), (pcp2), (oval1), (oval2), (nval1), (nval2))
+ __pcpu_double_call_return_bool(raw_cpu_cmpxchg_double_, (pcp1), (pcp2), (oval1), (oval2), (nval1), (nval2))
#endif
#endif /* __LINUX_PERCPU_H */
Index: linux/arch/x86/include/asm/percpu.h
===================================================================
--- linux.orig/arch/x86/include/asm/percpu.h 2014-01-30 14:40:36.186810863 -0600
+++ linux/arch/x86/include/asm/percpu.h 2014-01-30 14:40:36.186810863 -0600
@@ -52,7 +52,7 @@
* Compared to the generic __my_cpu_offset version, the following
* saves one instruction and avoids clobbering a temp register.
*/
-#define __this_cpu_ptr(ptr) \
+#define raw_cpu_ptr(ptr) \
({ \
unsigned long tcp_ptr__; \
__verify_pcpu_ptr(ptr); \
@@ -362,25 +362,25 @@
*/
#define this_cpu_read_stable(var) percpu_from_op("mov", var, "p" (&(var)))
-#define __this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
-#define __this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
-#define __this_cpu_read_4(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
-
-#define __this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
-#define __this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
-#define __this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
-#define __this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
-#define __this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
-#define __this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
-#define __this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
-#define __this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
-#define __this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
-#define __this_cpu_or_1(pcp, val) percpu_to_op("or", (pcp), val)
-#define __this_cpu_or_2(pcp, val) percpu_to_op("or", (pcp), val)
-#define __this_cpu_or_4(pcp, val) percpu_to_op("or", (pcp), val)
-#define __this_cpu_xchg_1(pcp, val) percpu_xchg_op(pcp, val)
-#define __this_cpu_xchg_2(pcp, val) percpu_xchg_op(pcp, val)
-#define __this_cpu_xchg_4(pcp, val) percpu_xchg_op(pcp, val)
+#define raw_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
+#define raw_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
+#define raw_cpu_read_4(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
+
+#define raw_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
+#define raw_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
+#define raw_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
+#define raw_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
+#define raw_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
+#define raw_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
+#define raw_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
+#define raw_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
+#define raw_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
+#define raw_cpu_or_1(pcp, val) percpu_to_op("or", (pcp), val)
+#define raw_cpu_or_2(pcp, val) percpu_to_op("or", (pcp), val)
+#define raw_cpu_or_4(pcp, val) percpu_to_op("or", (pcp), val)
+#define raw_cpu_xchg_1(pcp, val) percpu_xchg_op(pcp, val)
+#define raw_cpu_xchg_2(pcp, val) percpu_xchg_op(pcp, val)
+#define raw_cpu_xchg_4(pcp, val) percpu_xchg_op(pcp, val)
#define this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
@@ -401,16 +401,16 @@
#define this_cpu_xchg_2(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_xchg_4(pcp, nval) percpu_xchg_op(pcp, nval)
-#define __this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
-#define __this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
-#define __this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
-#define __this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
-#define __this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
-#define __this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
-
-#define this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
-#define this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
-#define this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
+#define raw_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
+#define raw_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
+#define raw_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
+#define raw_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
+#define raw_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
+#define raw_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
+
+#define this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
+#define this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
+#define this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
#define this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
#define this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
@@ -427,7 +427,7 @@
__ret; \
})
-#define __this_cpu_cmpxchg_double_4 percpu_cmpxchg8b_double
+#define raw_cpu_cmpxchg_double_4 percpu_cmpxchg8b_double
#define this_cpu_cmpxchg_double_4 percpu_cmpxchg8b_double
#endif /* CONFIG_X86_CMPXCHG64 */
@@ -436,22 +436,22 @@
* 32 bit must fall back to generic operations.
*/
#ifdef CONFIG_X86_64
-#define __this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
-#define __this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
-#define __this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
-#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
-#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
-#define __this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
-#define __this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
-#define __this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
-
-#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
-#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
-#define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
-#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
-#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
-#define this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
-#define this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
+#define raw_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
+#define raw_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
+#define raw_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
+#define raw_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
+#define raw_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
+#define raw_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
+#define raw_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
+#define raw_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
+
+#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
+#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
+#define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
+#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
+#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
+#define this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
+#define this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
#define this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
/*
@@ -474,7 +474,7 @@
__ret; \
})
-#define __this_cpu_cmpxchg_double_8 percpu_cmpxchg16b_double
+#define raw_cpu_cmpxchg_double_8 percpu_cmpxchg16b_double
#define this_cpu_cmpxchg_double_8 percpu_cmpxchg16b_double
#endif
@@ -495,9 +495,9 @@
unsigned long __percpu *a = (unsigned long *)addr + nr / BITS_PER_LONG;
#ifdef CONFIG_X86_64
- return ((1UL << (nr % BITS_PER_LONG)) & __this_cpu_read_8(*a)) != 0;
+ return ((1UL << (nr % BITS_PER_LONG)) & raw_cpu_read_8(*a)) != 0;
#else
- return ((1UL << (nr % BITS_PER_LONG)) & __this_cpu_read_4(*a)) != 0;
+ return ((1UL << (nr % BITS_PER_LONG)) & raw_cpu_read_4(*a)) != 0;
#endif
}
Index: linux/include/asm-generic/percpu.h
===================================================================
--- linux.orig/include/asm-generic/percpu.h 2014-01-30 14:40:36.186810863 -0600
+++ linux/include/asm-generic/percpu.h 2014-01-30 14:40:36.186810863 -0600
@@ -56,17 +56,17 @@
#define per_cpu(var, cpu) \
(*SHIFT_PERCPU_PTR(&(var), per_cpu_offset(cpu)))
-#ifndef __this_cpu_ptr
-#define __this_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset)
+#ifndef raw_cpu_ptr
+#define raw_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset)
#endif
#ifdef CONFIG_DEBUG_PREEMPT
#define this_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, my_cpu_offset)
#else
-#define this_cpu_ptr(ptr) __this_cpu_ptr(ptr)
+#define this_cpu_ptr(ptr) raw_cpu_ptr(ptr)
#endif
#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))
-#define __raw_get_cpu_var(var) (*__this_cpu_ptr(&(var)))
+#define __raw_get_cpu_var(var) (*raw_cpu_ptr(&(var)))
#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
extern void setup_per_cpu_areas(void);
@@ -83,7 +83,7 @@
#define __get_cpu_var(var) (*VERIFY_PERCPU_PTR(&(var)))
#define __raw_get_cpu_var(var) (*VERIFY_PERCPU_PTR(&(var)))
#define this_cpu_ptr(ptr) per_cpu_ptr(ptr, 0)
-#define __this_cpu_ptr(ptr) this_cpu_ptr(ptr)
+#define raw_cpu_ptr(ptr) this_cpu_ptr(ptr)
#endif /* SMP */
@@ -122,4 +122,7 @@
#define PER_CPU_DEF_ATTRIBUTES
#endif
+/* Keep until we have removed all uses of __this_cpu_ptr */
+#define __this_cpu_ptr raw_cpu_ptr
+
#endif /* _ASM_GENERIC_PERCPU_H_ */
Index: linux/arch/x86/include/asm/preempt.h
===================================================================
--- linux.orig/arch/x86/include/asm/preempt.h 2014-01-30 14:40:36.186810863 -0600
+++ linux/arch/x86/include/asm/preempt.h 2014-01-30 14:40:36.186810863 -0600
@@ -19,12 +19,12 @@
*/
static __always_inline int preempt_count(void)
{
- return __this_cpu_read_4(__preempt_count) & ~PREEMPT_NEED_RESCHED;
+ return raw_cpu_read_4(__preempt_count) & ~PREEMPT_NEED_RESCHED;
}
static __always_inline void preempt_count_set(int pc)
{
- __this_cpu_write_4(__preempt_count, pc);
+ raw_cpu_write_4(__preempt_count, pc);
}
/*
@@ -53,17 +53,17 @@
static __always_inline void set_preempt_need_resched(void)
{
- __this_cpu_and_4(__preempt_count, ~PREEMPT_NEED_RESCHED);
+ raw_cpu_and_4(__preempt_count, ~PREEMPT_NEED_RESCHED);
}
static __always_inline void clear_preempt_need_resched(void)
{
- __this_cpu_or_4(__preempt_count, PREEMPT_NEED_RESCHED);
+ raw_cpu_or_4(__preempt_count, PREEMPT_NEED_RESCHED);
}
static __always_inline bool test_preempt_need_resched(void)
{
- return !(__this_cpu_read_4(__preempt_count) & PREEMPT_NEED_RESCHED);
+ return !(raw_cpu_read_4(__preempt_count) & PREEMPT_NEED_RESCHED);
}
/*
@@ -72,12 +72,12 @@
static __always_inline void __preempt_count_add(int val)
{
- __this_cpu_add_4(__preempt_count, val);
+ raw_cpu_add_4(__preempt_count, val);
}
static __always_inline void __preempt_count_sub(int val)
{
- __this_cpu_add_4(__preempt_count, -val);
+ raw_cpu_add_4(__preempt_count, -val);
}
/*
@@ -95,7 +95,7 @@
*/
static __always_inline bool should_resched(void)
{
- return unlikely(!__this_cpu_read_4(__preempt_count));
+ return unlikely(!raw_cpu_read_4(__preempt_count));
}
#ifdef CONFIG_PREEMPT