perf tools: Don't use code surrounded by __KERNEL__

We need to refactor code to be explicitely shared by the kernel and at
least the tools/ userspace programs, so, till we do that, copy the bare
minimum bitmap/bitops code needed by tools/perf.

Reported-by: "H. Peter Anvin" <hpa@zytor.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 35 insertions, 3 deletions

diff --git a/tools/perf/util/include/linux/bitmap.h b/tools/perf/util/include/linux/bitmap.h
index 94507639a8c4..eda4416efa0a 100644
--- a/tools/perf/util/include/linux/bitmap.h
+++ b/tools/perf/util/include/linux/bitmap.h
@@ -1,3 +1,35 @@
-#include "../../../../include/linux/bitmap.h"
-#include "../../../../include/asm-generic/bitops/find.h"
-#include <linux/errno.h>
+#ifndef _PERF_BITOPS_H
+#define _PERF_BITOPS_H
+
+#include <string.h>
+#include <linux/bitops.h>
+
+int __bitmap_weight(const unsigned long *bitmap, int bits);
+
+#define BITMAP_LAST_WORD_MASK(nbits)                                    \
+(                                                                       \
+        ((nbits) % BITS_PER_LONG) ?                                     \
+                (1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL               \
+)
+
+#define small_const_nbits(nbits) \
+        (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
+
+static inline void bitmap_zero(unsigned long *dst, int nbits)
+{
+        if (small_const_nbits(nbits))
+                *dst = 0UL;
+        else {
+                int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
+                memset(dst, 0, len);
+        }
+}
+
+static inline int bitmap_weight(const unsigned long *src, int nbits)
+{
+        if (small_const_nbits(nbits))
+                return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
+        return __bitmap_weight(src, nbits);
+}
+
+#endif /* _PERF_BITOPS_H */