summaryrefslogtreecommitdiffstats
path: root/tools/perf/util/include
diff options
context:
space:
mode:
authorDavid Ahern <dsahern@gmail.com>2012-06-08 11:47:51 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-06-11 11:20:01 -0300
commit80c0120a3cca30166c0ab8b24e44be67e97b79af (patch)
treee7328b01e584d810f30e044f0286254a7b12bead /tools/perf/util/include
parent9ee6ddc9dada9cc4b2201631bc74fbf203183a10 (diff)
perf tools: Fix endianity swapping for adds_features bitmask
Based on Jiri's latest attempt: https://lkml.org/lkml/2012/5/16/61 Basically, adds_features should be byte swapped assuming unsigned longs are either 8-bytes (u64) or 4-bytes (u32). Fixes 32-bit ppc dumping 64-bit x86 feature data: ======== captured on: Sun May 20 19:23:23 2012 hostname : nxos-vdc-dev3 os release : 3.4.0-rc7+ perf version : 3.4.rc4.137.g978da3 arch : x86_64 nrcpus online : 16 nrcpus avail : 16 cpudesc : Intel(R) Xeon(R) CPU E5540 @ 2.53GHz cpuid : GenuineIntel,6,26,5 total memory : 24680324 kB ... Verified 64-bit x86 can still dump feature data for 32-bit ppc. Signed-off-by: David Ahern <dsahern@gmail.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/4FBBB539.5010805@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/include')
-rw-r--r--tools/perf/util/include/linux/bitops.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/include/linux/bitops.h b/tools/perf/util/include/linux/bitops.h
index f1584833bd2..587a230d207 100644
--- a/tools/perf/util/include/linux/bitops.h
+++ b/tools/perf/util/include/linux/bitops.h
@@ -8,6 +8,8 @@
#define BITS_PER_LONG __WORDSIZE
#define BITS_PER_BYTE 8
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
+#define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u64))
+#define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u32))
#define for_each_set_bit(bit, addr, size) \
for ((bit) = find_first_bit((addr), (size)); \