Linus Torvalds 5f2f280f87 This includes three fixes. Two fix features added in 3.9 and one ... fixes a long time minor bug. The first patch fixes a race that can happen if the user switches from the irqsoff tracer to another tracer. If a irqs off latency is detected, it will try to use the snapshot buffer, but the new tracer wont have it allocated. There's a nasty warning that gets printed and the trace is ignored. Nothing crashes, just a nasty WARN_ON is shown. The second patch fixes an issue where if the sysctl is used to disable and enable function tracing, it can put the function tracing into an unstable state. The third patch fixes an issue with perf using the function tracer. An update was done, where the stub function could be called during the perf function tracing, and that stub function wont have the "control" flag set and cause a nasty warning when running perf. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJRYyyXAAoJEOdOSU1xswtMMtQH/0Ks494IyC9zAcSFZXJGagc2 bV1k2WrHUuXZnDEP3DIrwS87YwYOYD6l/7TW7AUc2AsFIgwsQ8tP+riI2FZVduAs LLKR3NxE8B8hi+QS7fbEXea6jcRX2I+gnsv8bLenDVbliCWs1wZbSo8jbyOFjpKa AWRpjIIBmKYB/dGn87YVOLAYHiMUO5WScKwJV0bCL9m5r2/7a1nu1j8KiQ9N0Vun 43jimIHYDlI/eSOGNIJPFAc/zjPXlPDFrpGcPg6wgUDfwSO0Cbz2PM46uxen+s91 Z4mbiqEONSTcl/wKYx9s6zRY+brkvP3AK0d1x1Al+TkTeFeaVPkTwmKSI/e46ow= =9Ide -----END PGP SIGNATURE----- Merge tag 'trace-fixes-3.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fixes from Steven Rostedt: "This includes three fixes. Two fix features added in 3.9 and one fixes a long time minor bug. The first patch fixes a race that can happen if the user switches from the irqsoff tracer to another tracer. If a irqs off latency is detected, it will try to use the snapshot buffer, but the new tracer wont have it allocated. There's a nasty warning that gets printed and the trace is ignored. Nothing crashes, just a nasty WARN_ON is shown. The second patch fixes an issue where if the sysctl is used to disable and enable function tracing, it can put the function tracing into an unstable state. The third patch fixes an issue with perf using the function tracer. An update was done, where the stub function could be called during the perf function tracing, and that stub function wont have the "control" flag set and cause a nasty warning when running perf." * tag 'trace-fixes-3.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ftrace: Do not call stub functions in control loop ftrace: Consistently restore trace function on sysctl enabling tracing: Fix race with update_max_tr_single and changing tracers		2013-04-08 15:14:11 -07:00
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