Merge branch 'perf/core-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into perf/hw_breakpoints

Pull AMD range breakpoints support from Frederic Weisbecker:

" - Extend breakpoint tools and core to support address range through perf
    event with initial backend support for AMD extended breakpoints.

    Syntax is:

           perf record -e mem:addr/len:type

    For example set write breakpoint from 0x1000 to 0x1200 (0x1000 + 512)

           perf record -e mem:0x1000/512:w

 - Clean up a bit breakpoint code validation

 It has been acked by Jiri and Oleg. "

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/tools/perf/util/include/linux/bitmap.h b/tools/perf/util/include/linux/bitmap.h
index 01ffd12dc791..40bd21488032 100644
--- a/tools/perf/util/include/linux/bitmap.h
+++ b/tools/perf/util/include/linux/bitmap.h
@@ -46,4 +46,21 @@ static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
                 __bitmap_or(dst, src1, src2, nbits);
 }
 
+/**
+ * test_and_set_bit - Set a bit and return its old value
+ * @nr: Bit to set
+ * @addr: Address to count from
+ */
+static inline int test_and_set_bit(int nr, unsigned long *addr)
+{
+        unsigned long mask = BIT_MASK(nr);
+        unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
+        unsigned long old;
+
+        old = *p;
+        *p = old | mask;
+
+        return (old & mask) != 0;
+}
+
 #endif /* _PERF_BITOPS_H */