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Commit 85be928c authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'perfcounters-fixes-for-linus' of... 

Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (50 commits)
  perf report: Add "Fractal" mode output - support callchains with relative overhead rate
  perf_counter tools: callchains: Manage the cumul hits on the fly
  perf report: Change default callchain parameters
  perf report: Use a modifiable string for default callchain options
  perf report: Warn on callchain output request from non-callchain file
  x86: atomic64: Inline atomic64_read() again
  x86: atomic64: Clean up atomic64_sub_and_test() and atomic64_add_negative()
  x86: atomic64: Improve atomic64_xchg()
  x86: atomic64: Export APIs to modules
  x86: atomic64: Improve atomic64_read()
  x86: atomic64: Code atomic(64)_read and atomic(64)_set in C not CPP
  x86: atomic64: Fix unclean type use in atomic64_xchg()
  x86: atomic64: Make atomic_read() type-safe
  x86: atomic64: Reduce size of functions
  x86: atomic64: Improve atomic64_add_return()
  x86: atomic64: Improve cmpxchg8b()
  x86: atomic64: Improve atomic64_read()
  x86: atomic64: Move the 32-bit atomic64_t implementation to a .c file
  x86: atomic64: The atomic64_t data type should be 8 bytes aligned on 32-bit too
  perf report: Annotate variable initialization
  ...
parents d86ee480 805d127d

arch/powerpc/kernel/power7-pmu.c

+1 −0
Original line number Diff line number Diff line
@@ -358,6 +358,7 @@ static struct power_pmu power7_pmu = { 
	.get_constraint		= power7_get_constraint,

	.get_alternatives	= power7_get_alternatives,

	.disable_pmc		= power7_disable_pmc,

	.flags			= PPMU_ALT_SIPR,

	.n_generic		= ARRAY_SIZE(power7_generic_events),

	.generic_events		= power7_generic_events,

	.cache_events		= &power7_cache_events,

arch/x86/include/asm/atomic_32.h

+57 −128
Original line number Diff line number Diff line
@@ -19,7 +19,10 @@ 
 *

 * Atomically reads the value of @v.

 */

#define atomic_read(v)		((v)->counter)

static inline int atomic_read(const atomic_t *v)

{

	return v->counter;

}



/**

 * atomic_set - set atomic variable
@@ -28,7 +31,10 @@ 
 *

 * Atomically sets the value of @v to @i.

 */

#define atomic_set(v, i)	(((v)->counter) = (i))

static inline void atomic_set(atomic_t *v, int i)

{

	v->counter = i;

}



/**

 * atomic_add - add integer to atomic variable
@@ -200,8 +206,15 @@ static inline int atomic_sub_return(int i, atomic_t *v) 
	return atomic_add_return(-i, v);

}



#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))

#define atomic_xchg(v, new) (xchg(&((v)->counter), (new)))

static inline int atomic_cmpxchg(atomic_t *v, int old, int new)

{

	return cmpxchg(&v->counter, old, new);

}



static inline int atomic_xchg(atomic_t *v, int new)

{

	return xchg(&v->counter, new);

}



/**

 * atomic_add_unless - add unless the number is already a given value
@@ -250,45 +263,12 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u) 
/* An 64bit atomic type */



typedef struct {

	unsigned long long counter;

	u64 __aligned(8) counter;

} atomic64_t;



#define ATOMIC64_INIT(val)	{ (val) }



/**

 * atomic64_read - read atomic64 variable

 * @ptr: pointer of type atomic64_t

 *

 * Atomically reads the value of @v.

 * Doesn't imply a read memory barrier.

 */

#define __atomic64_read(ptr)		((ptr)->counter)



static inline unsigned long long

cmpxchg8b(unsigned long long *ptr, unsigned long long old, unsigned long long new)

{

	asm volatile(



		LOCK_PREFIX "cmpxchg8b (%[ptr])\n"



		     :		"=A" (old)



		     : [ptr]	"D" (ptr),

				"A" (old),

				"b" (ll_low(new)),

				"c" (ll_high(new))



		     : "memory");



	return old;

}



static inline unsigned long long

atomic64_cmpxchg(atomic64_t *ptr, unsigned long long old_val,

		 unsigned long long new_val)

{

	return cmpxchg8b(&ptr->counter, old_val, new_val);

}

extern u64 atomic64_cmpxchg(atomic64_t *ptr, u64 old_val, u64 new_val);



/**

 * atomic64_xchg - xchg atomic64 variable
@@ -298,18 +278,7 @@ atomic64_cmpxchg(atomic64_t *ptr, unsigned long long old_val, 
 * Atomically xchgs the value of @ptr to @new_val and returns

 * the old value.

 */



static inline unsigned long long

atomic64_xchg(atomic64_t *ptr, unsigned long long new_val)

{

	unsigned long long old_val;



	do {

		old_val = atomic_read(ptr);

	} while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);



	return old_val;

}

extern u64 atomic64_xchg(atomic64_t *ptr, u64 new_val);



/**

 * atomic64_set - set atomic64 variable
@@ -318,10 +287,7 @@ atomic64_xchg(atomic64_t *ptr, unsigned long long new_val) 
 *

 * Atomically sets the value of @ptr to @new_val.

 */

static inline void atomic64_set(atomic64_t *ptr, unsigned long long new_val)

{

	atomic64_xchg(ptr, new_val);

}

extern void atomic64_set(atomic64_t *ptr, u64 new_val);



/**

 * atomic64_read - read atomic64 variable
@@ -329,17 +295,30 @@ static inline void atomic64_set(atomic64_t *ptr, unsigned long long new_val) 
 *

 * Atomically reads the value of @ptr and returns it.

 */

static inline unsigned long long atomic64_read(atomic64_t *ptr)

static inline u64 atomic64_read(atomic64_t *ptr)

{

	unsigned long long curr_val;



	do {

		curr_val = __atomic64_read(ptr);

	} while (atomic64_cmpxchg(ptr, curr_val, curr_val) != curr_val);

	u64 res;



	return curr_val;

	/*

	 * Note, we inline this atomic64_t primitive because

	 * it only clobbers EAX/EDX and leaves the others

	 * untouched. We also (somewhat subtly) rely on the

	 * fact that cmpxchg8b returns the current 64-bit value

	 * of the memory location we are touching:

	 */

	asm volatile(

		"mov %%ebx, %%eax\n\t"

		"mov %%ecx, %%edx\n\t"

		LOCK_PREFIX "cmpxchg8b %1\n"

			: "=&A" (res)

			: "m" (*ptr)

		);



	return res;

}



extern u64 atomic64_read(atomic64_t *ptr);



/**

 * atomic64_add_return - add and return

 * @delta: integer value to add
@@ -347,34 +326,14 @@ static inline unsigned long long atomic64_read(atomic64_t *ptr) 
 *

 * Atomically adds @delta to @ptr and returns @delta + *@ptr

 */

static inline unsigned long long

atomic64_add_return(unsigned long long delta, atomic64_t *ptr)

{

	unsigned long long old_val, new_val;



	do {

		old_val = atomic_read(ptr);

		new_val = old_val + delta;



	} while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);



	return new_val;

}



static inline long atomic64_sub_return(unsigned long long delta, atomic64_t *ptr)

{

	return atomic64_add_return(-delta, ptr);

}

extern u64 atomic64_add_return(u64 delta, atomic64_t *ptr);



static inline long atomic64_inc_return(atomic64_t *ptr)

{

	return atomic64_add_return(1, ptr);

}



static inline long atomic64_dec_return(atomic64_t *ptr)

{

	return atomic64_sub_return(1, ptr);

}

/*

 * Other variants with different arithmetic operators:

 */

extern u64 atomic64_sub_return(u64 delta, atomic64_t *ptr);

extern u64 atomic64_inc_return(atomic64_t *ptr);

extern u64 atomic64_dec_return(atomic64_t *ptr);



/**

 * atomic64_add - add integer to atomic64 variable
@@ -383,10 +342,7 @@ static inline long atomic64_dec_return(atomic64_t *ptr) 
 *

 * Atomically adds @delta to @ptr.

 */

static inline void atomic64_add(unsigned long long delta, atomic64_t *ptr)

{

	atomic64_add_return(delta, ptr);

}

extern void atomic64_add(u64 delta, atomic64_t *ptr);



/**

 * atomic64_sub - subtract the atomic64 variable
@@ -395,10 +351,7 @@ static inline void atomic64_add(unsigned long long delta, atomic64_t *ptr) 
 *

 * Atomically subtracts @delta from @ptr.

 */

static inline void atomic64_sub(unsigned long long delta, atomic64_t *ptr)

{

	atomic64_add(-delta, ptr);

}

extern void atomic64_sub(u64 delta, atomic64_t *ptr);



/**

 * atomic64_sub_and_test - subtract value from variable and test result
@@ -409,13 +362,7 @@ static inline void atomic64_sub(unsigned long long delta, atomic64_t *ptr) 
 * true if the result is zero, or false for all

 * other cases.

 */

static inline int

atomic64_sub_and_test(unsigned long long delta, atomic64_t *ptr)

{

	unsigned long long old_val = atomic64_sub_return(delta, ptr);



	return old_val == 0;

}

extern int atomic64_sub_and_test(u64 delta, atomic64_t *ptr);



/**

 * atomic64_inc - increment atomic64 variable
@@ -423,10 +370,7 @@ atomic64_sub_and_test(unsigned long long delta, atomic64_t *ptr) 
 *

 * Atomically increments @ptr by 1.

 */

static inline void atomic64_inc(atomic64_t *ptr)

{

	atomic64_add(1, ptr);

}

extern void atomic64_inc(atomic64_t *ptr);



/**

 * atomic64_dec - decrement atomic64 variable
@@ -434,10 +378,7 @@ static inline void atomic64_inc(atomic64_t *ptr) 
 *

 * Atomically decrements @ptr by 1.

 */

static inline void atomic64_dec(atomic64_t *ptr)

{

	atomic64_sub(1, ptr);

}

extern void atomic64_dec(atomic64_t *ptr);



/**

 * atomic64_dec_and_test - decrement and test
@@ -447,10 +388,7 @@ static inline void atomic64_dec(atomic64_t *ptr) 
 * returns true if the result is 0, or false for all other

 * cases.

 */

static inline int atomic64_dec_and_test(atomic64_t *ptr)

{

	return atomic64_sub_and_test(1, ptr);

}

extern int atomic64_dec_and_test(atomic64_t *ptr);



/**

 * atomic64_inc_and_test - increment and test
@@ -460,10 +398,7 @@ static inline int atomic64_dec_and_test(atomic64_t *ptr) 
 * and returns true if the result is zero, or false for all

 * other cases.

 */

static inline int atomic64_inc_and_test(atomic64_t *ptr)

{

	return atomic64_sub_and_test(-1, ptr);

}

extern int atomic64_inc_and_test(atomic64_t *ptr);



/**

 * atomic64_add_negative - add and test if negative
@@ -474,13 +409,7 @@ static inline int atomic64_inc_and_test(atomic64_t *ptr) 
 * if the result is negative, or false when

 * result is greater than or equal to zero.

 */

static inline int

atomic64_add_negative(unsigned long long delta, atomic64_t *ptr)

{

	long long old_val = atomic64_add_return(delta, ptr);



	return old_val < 0;

}

extern int atomic64_add_negative(u64 delta, atomic64_t *ptr);



#include <asm-generic/atomic-long.h>

#endif /* _ASM_X86_ATOMIC_32_H */

arch/x86/include/asm/atomic_64.h

+34 −8
Original line number Diff line number Diff line
@@ -18,7 +18,10 @@ 
 *

 * Atomically reads the value of @v.

 */

#define atomic_read(v)		((v)->counter)

static inline int atomic_read(const atomic_t *v)

{

	return v->counter;

}



/**

 * atomic_set - set atomic variable
@@ -27,7 +30,10 @@ 
 *

 * Atomically sets the value of @v to @i.

 */

#define atomic_set(v, i)		(((v)->counter) = (i))

static inline void atomic_set(atomic_t *v, int i)

{

	v->counter = i;

}



/**

 * atomic_add - add integer to atomic variable
@@ -192,7 +198,10 @@ static inline int atomic_sub_return(int i, atomic_t *v) 
 * Atomically reads the value of @v.

 * Doesn't imply a read memory barrier.

 */

#define atomic64_read(v)		((v)->counter)

static inline long atomic64_read(const atomic64_t *v)

{

	return v->counter;

}



/**

 * atomic64_set - set atomic64 variable
@@ -201,7 +210,10 @@ static inline int atomic_sub_return(int i, atomic_t *v) 
 *

 * Atomically sets the value of @v to @i.

 */

#define atomic64_set(v, i)		(((v)->counter) = (i))

static inline void atomic64_set(atomic64_t *v, long i)

{

	v->counter = i;

}



/**

 * atomic64_add - add integer to atomic64 variable
@@ -355,11 +367,25 @@ static inline long atomic64_sub_return(long i, atomic64_t *v) 
#define atomic64_inc_return(v)  (atomic64_add_return(1, (v)))

#define atomic64_dec_return(v)  (atomic64_sub_return(1, (v)))



#define atomic64_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))

#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))

static inline long atomic64_cmpxchg(atomic64_t *v, long old, long new)

{

	return cmpxchg(&v->counter, old, new);

}



static inline long atomic64_xchg(atomic64_t *v, long new)

{

	return xchg(&v->counter, new);

}



#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))

#define atomic_xchg(v, new) (xchg(&((v)->counter), (new)))

static inline long atomic_cmpxchg(atomic_t *v, int old, int new)

{

	return cmpxchg(&v->counter, old, new);

}



static inline long atomic_xchg(atomic_t *v, int new)

{

	return xchg(&v->counter, new);

}



/**

 * atomic_add_unless - add unless the number is a given value

arch/x86/include/asm/stacktrace.h

+2 −0
Original line number Diff line number Diff line
@@ -3,6 +3,8 @@ 


extern int kstack_depth_to_print;



int x86_is_stack_id(int id, char *name);



/* Generic stack tracer with callbacks */



struct stacktrace_ops {

arch/x86/kernel/cpu/perf_counter.c

+7 −1
Original line number Diff line number Diff line
@@ -1561,6 +1561,7 @@ void callchain_store(struct perf_callchain_entry *entry, u64 ip) 


static DEFINE_PER_CPU(struct perf_callchain_entry, irq_entry);

static DEFINE_PER_CPU(struct perf_callchain_entry, nmi_entry);

static DEFINE_PER_CPU(int, in_nmi_frame);





static void
@@ -1576,7 +1577,9 @@ static void backtrace_warning(void *data, char *msg) 


static int backtrace_stack(void *data, char *name)

{

	/* Process all stacks: */

	per_cpu(in_nmi_frame, smp_processor_id()) =

			x86_is_stack_id(NMI_STACK, name);



	return 0;

}
@@ -1584,6 +1587,9 @@ static void backtrace_address(void *data, unsigned long addr, int reliable) 
{

	struct perf_callchain_entry *entry = data;



	if (per_cpu(in_nmi_frame, smp_processor_id()))

		return;



	if (reliable)

		callchain_store(entry, addr);

}