diff options
author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-04-28 12:30:53 -0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-05-16 23:11:50 -0300 |
commit | cfbcf468454ab4b20f0b4b62da51920b99fdb19e (patch) | |
tree | 08b7caa605bd1ef1babb8f58cb0771bc20e518c4 /arch/arm64/kernel/perf_callchain.c | |
parent | a831100aeefbe6d9f3e47a3e2712f82c042f1f5c (diff) | |
download | linux-stable-cfbcf468454ab4b20f0b4b62da51920b99fdb19e.tar.gz linux-stable-cfbcf468454ab4b20f0b4b62da51920b99fdb19e.tar.bz2 linux-stable-cfbcf468454ab4b20f0b4b62da51920b99fdb19e.zip |
perf core: Pass max stack as a perf_callchain_entry context
This makes perf_callchain_{user,kernel}() receive the max stack
as context for the perf_callchain_entry, instead of accessing
the global sysctl_perf_event_max_stack.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/n/tip-kolmn1yo40p7jhswxwrc7rrd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'arch/arm64/kernel/perf_callchain.c')
-rw-r--r-- | arch/arm64/kernel/perf_callchain.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/arm64/kernel/perf_callchain.c b/arch/arm64/kernel/perf_callchain.c index 32c3c6e70119..0d60150057cf 100644 --- a/arch/arm64/kernel/perf_callchain.c +++ b/arch/arm64/kernel/perf_callchain.c @@ -31,7 +31,7 @@ struct frame_tail { */ static struct frame_tail __user * user_backtrace(struct frame_tail __user *tail, - struct perf_callchain_entry *entry) + struct perf_callchain_entry_ctx *entry) { struct frame_tail buftail; unsigned long err; @@ -76,7 +76,7 @@ struct compat_frame_tail { static struct compat_frame_tail __user * compat_user_backtrace(struct compat_frame_tail __user *tail, - struct perf_callchain_entry *entry) + struct perf_callchain_entry_ctx *entry) { struct compat_frame_tail buftail; unsigned long err; @@ -106,7 +106,7 @@ compat_user_backtrace(struct compat_frame_tail __user *tail, } #endif /* CONFIG_COMPAT */ -void perf_callchain_user(struct perf_callchain_entry *entry, +void perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs) { if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) { @@ -122,7 +122,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry, tail = (struct frame_tail __user *)regs->regs[29]; - while (entry->nr < sysctl_perf_event_max_stack && + while (entry->entry->nr < entry->max_stack && tail && !((unsigned long)tail & 0xf)) tail = user_backtrace(tail, entry); } else { @@ -132,7 +132,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry, tail = (struct compat_frame_tail __user *)regs->compat_fp - 1; - while ((entry->nr < sysctl_perf_event_max_stack) && + while ((entry->entry->nr < entry->max_stack) && tail && !((unsigned long)tail & 0x3)) tail = compat_user_backtrace(tail, entry); #endif @@ -146,12 +146,12 @@ void perf_callchain_user(struct perf_callchain_entry *entry, */ static int callchain_trace(struct stackframe *frame, void *data) { - struct perf_callchain_entry *entry = data; + struct perf_callchain_entry_ctx *entry = data; perf_callchain_store(entry, frame->pc); return 0; } -void perf_callchain_kernel(struct perf_callchain_entry *entry, +void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs) { struct stackframe frame; |