Commit-ID: 5f970521d3279d99adcdebf329631e36cb9f0deb Gitweb: https://git.kernel.org/tip/5f970521d3279d99adcdebf329631e36cb9f0deb Author: Jiri Olsa <jo...@kernel.org> AuthorDate: Mon, 12 Mar 2018 14:45:46 +0100 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 13 Mar 2018 06:56:08 +0100
perf/core: Move perf_event_attr::sample_max_stack into perf_copy_attr() Move the sample_max_stack check and setup into perf_copy_attr(), so we have all perf_event_attr initial setup in one place and can easily compare attrs in the new ioctl introduced in following change. Suggested-by: Peter Zijlstra <pet...@infradead.org> Signed-off-by: Jiri Olsa <jo...@kernel.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Arnaldo Carvalho de Melo <a...@redhat.com> Cc: David Ahern <dsah...@gmail.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Hari Bathini <hbath...@linux.vnet.ibm.com> Cc: Jin Yao <yao....@linux.intel.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Kan Liang <kan.li...@intel.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Michael Ellerman <m...@ellerman.id.au> Cc: Milind Chabbi <chabbi.mil...@gmail.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Oleg Nesterov <onest...@redhat.com> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Will Deacon <will.dea...@arm.com> Link: http://lkml.kernel.org/r/20180312134548.31532-7-jo...@kernel.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/events/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 969f865f9f1c..ee145bdee6ed 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -10125,6 +10125,9 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr, ret = -EINVAL; } + if (!attr->sample_max_stack) + attr->sample_max_stack = sysctl_perf_event_max_stack; + if (attr->sample_type & PERF_SAMPLE_REGS_INTR) ret = perf_reg_validate(attr->sample_regs_intr); out: @@ -10338,9 +10341,6 @@ SYSCALL_DEFINE5(perf_event_open, perf_paranoid_kernel() && !capable(CAP_SYS_ADMIN)) return -EACCES; - if (!attr.sample_max_stack) - attr.sample_max_stack = sysctl_perf_event_max_stack; - /* * In cgroup mode, the pid argument is used to pass the fd * opened to the cgroup directory in cgroupfs. The cpu argument
