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authorLinus Torvalds <torvalds@linux-foundation.org>2017-05-12 10:45:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-12 10:45:36 -0700
commite0c4a5fc750e22c6f8d5c1ab7cc18592b88852ab (patch)
treeb4ca5dfc9208be7f789786f16e2c0fde1e15547b /kernel
parentdfcb7b2379ff90afb9231da040046f4b9eb1c895 (diff)
parent88b0193d9418c00340e45e0a913a0813bc6c8c96 (diff)
downloadop-kernel-dev-e0c4a5fc750e22c6f8d5c1ab7cc18592b88852ab.zip
op-kernel-dev-e0c4a5fc750e22c6f8d5c1ab7cc18592b88852ab.tar.gz
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates/fixes from Ingo Molnar: "Mostly tooling updates, but also two kernel fixes: a call chain handling robustness fix and an x86 PMU driver event definition fix" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/callchain: Force USER_DS when invoking perf_callchain_user() tools build: Fixup sched_getcpu feature test perf tests kmod-path: Don't fail if compressed modules aren't supported perf annotate: Fix AArch64 comment char perf tools: Fix spelling mistakes perf/x86: Fix Broadwell-EP DRAM RAPL events perf config: Refactor a duplicated code for obtaining config file name perf symbols: Allow user probes on versioned symbols perf symbols: Accept symbols starting at address 0 tools lib string: Adopt prefixcmp() from perf and subcmd perf units: Move parse_tag_value() to units.[ch] perf ui gtk: Move gtk .so name to the only place where it is used perf tools: Move HAS_BOOL define to where perl headers are used perf memswap: Split the byteswap memory range wrappers from util.[ch] perf tools: Move event prototypes from util.h to event.h perf buildid: Move prototypes from util.h to build-id.h
Diffstat (limited to 'kernel')
-rw-r--r--kernel/events/callchain.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c
index c04917c..1b2be63 100644
--- a/kernel/events/callchain.c
+++ b/kernel/events/callchain.c
@@ -229,12 +229,18 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
}
if (regs) {
+ mm_segment_t fs;
+
if (crosstask)
goto exit_put;
if (add_mark)
perf_callchain_store_context(&ctx, PERF_CONTEXT_USER);
+
+ fs = get_fs();
+ set_fs(USER_DS);
perf_callchain_user(&ctx, regs);
+ set_fs(fs);
}
}
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