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| author | Jiri Kosina | 2016-04-15 11:31:51 +0200 |
|---|---|---|
| committer | Jiri Kosina | 2016-04-15 11:42:51 +0200 |
| commit | 4d4fb97a62105c07dcccd350c391a65f576726c4 (patch) | |
| tree | 36f5ba480d7ea790b8cedf7e49bebab781659f73 /kernel/trace | |
| parent | livepatch: robustify klp_register_patch() API error checking (diff) | |
| parent | powerpc/livepatch: Add live patching support on ppc64le (diff) | |
| download | kernel-qcow2-linux-4d4fb97a62105c07dcccd350c391a65f576726c4.tar.gz kernel-qcow2-linux-4d4fb97a62105c07dcccd350c391a65f576726c4.tar.xz kernel-qcow2-linux-4d4fb97a62105c07dcccd350c391a65f576726c4.zip | |
Merge branch 'topic/livepatch' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux into for-4.7/livepatching-ppc64le
Pull livepatching support for ppc64 architecture from Michael Ellerman.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/ftrace.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 57a6eea84694..f4e6aae6ebe7 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1533,7 +1533,19 @@ static int ftrace_cmp_recs(const void *a, const void *b) return 0; } -static unsigned long ftrace_location_range(unsigned long start, unsigned long end) +/** + * ftrace_location_range - return the first address of a traced location + * if it touches the given ip range + * @start: start of range to search. + * @end: end of range to search (inclusive). @end points to the last byte + * to check. + * + * Returns rec->ip if the related ftrace location is a least partly within + * the given address range. That is, the first address of the instruction + * that is either a NOP or call to the function tracer. It checks the ftrace + * internal tables to determine if the address belongs or not. + */ +unsigned long ftrace_location_range(unsigned long start, unsigned long end) { struct ftrace_page *pg; struct dyn_ftrace *rec; |