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Commit 01aab518 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge branch 'oprofile-for-tip' of... 

Merge branch 'oprofile-for-tip' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into x86/urgent
parents fed4d59b 7c64ade5

arch/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -21,7 +21,7 @@ config OPROFILE_IBS 
          Instruction-Based Sampling (IBS) is a new profiling

          technique that provides rich, precise program performance

          information. IBS is introduced by AMD Family10h processors

          (AMD Opteron Quad-Core processor “Barcelona”) to overcome

          (AMD Opteron Quad-Core processor "Barcelona") to overcome

          the limitations of conventional performance counter

          sampling.

arch/x86/oprofile/op_model_ppro.c

+4 −5
Original line number Diff line number Diff line
@@ -27,8 +27,7 @@ static int num_counters = 2; 
static int counter_width = 32;



#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)

#define CTR_READ(l, h, msrs, c) do {rdmsr(msrs->counters[(c)].addr, (l), (h)); } while (0)

#define CTR_OVERFLOWED(n) (!((n) & (1U<<(counter_width-1))))

#define CTR_OVERFLOWED(n) (!((n) & (1ULL<<(counter_width-1))))



#define CTRL_IS_RESERVED(msrs, c) (msrs->controls[(c)].addr ? 1 : 0)

#define CTRL_READ(l, h, msrs, c) do {rdmsr((msrs->controls[(c)].addr), (l), (h)); } while (0)
@@ -124,14 +123,14 @@ static void ppro_setup_ctrs(struct op_msrs const * const msrs) 
static int ppro_check_ctrs(struct pt_regs * const regs,

			   struct op_msrs const * const msrs)

{

	unsigned int low, high;

	u64 val;

	int i;



	for (i = 0 ; i < num_counters; ++i) {

		if (!reset_value[i])

			continue;

		CTR_READ(low, high, msrs, i);

		if (CTR_OVERFLOWED(low)) {

		rdmsrl(msrs->counters[i].addr, val);

		if (CTR_OVERFLOWED(val)) {

			oprofile_add_sample(regs, i);

			wrmsrl(msrs->counters[i].addr, -reset_value[i]);

		}

drivers/oprofile/event_buffer.c

+3 −3
Original line number Diff line number Diff line
@@ -105,7 +105,7 @@ static int event_buffer_open(struct inode *inode, struct file *file) 
	if (!capable(CAP_SYS_ADMIN))

		return -EPERM;



	if (test_and_set_bit(0, &buffer_opened))

	if (test_and_set_bit_lock(0, &buffer_opened))

		return -EBUSY;



	/* Register as a user of dcookies
@@ -129,7 +129,7 @@ static int event_buffer_open(struct inode *inode, struct file *file) 
fail:

	dcookie_unregister(file->private_data);

out:

	clear_bit(0, &buffer_opened);

	__clear_bit_unlock(0, &buffer_opened);

	return err;

}
@@ -141,7 +141,7 @@ static int event_buffer_release(struct inode *inode, struct file *file) 
	dcookie_unregister(file->private_data);

	buffer_pos = 0;

	atomic_set(&buffer_ready, 0);

	clear_bit(0, &buffer_opened);

	__clear_bit_unlock(0, &buffer_opened);

	return 0;

}