c4158ff536
This patch adds the __irq_entry annotation to the default x86
platform IRQ handlers. ftrace's function_graph tracer uses the
__irq_entry annotation to notify the entry and return of IRQ
handlers.
For example, before the patch:
354549.667252 | 3) d..1 | default_idle_call() {
354549.667252 | 3) d..1 | arch_cpu_idle() {
354549.667253 | 3) d..1 | default_idle() {
354549.696886 | 3) d..1 | smp_trace_reschedule_interrupt() {
354549.696886 | 3) d..1 | irq_enter() {
354549.696886 | 3) d..1 | rcu_irq_enter() {
After the patch:
366416.254476 | 3) d..1 | arch_cpu_idle() {
366416.254476 | 3) d..1 | default_idle() {
366416.261566 | 3) d..1 ==========> |
366416.261566 | 3) d..1 | smp_trace_reschedule_interrupt() {
366416.261566 | 3) d..1 | irq_enter() {
366416.261566 | 3) d..1 | rcu_irq_enter() {
KASAN also uses this annotation. The smp_apic_timer_interrupt()
was already annotated.
Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Aaron Lu <aaron.lu@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Claudio Fontana <claudio.fontana@huawei.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: Gu Zheng <guz.fnst@cn.fujitsu.com>
Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicolai Stange <nicstange@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: linux-edac@vger.kernel.org
Link: http://lkml.kernel.org/r/059fdf437c2f0c09b13c18c8fe4e69999d3ffe69.1483528431.git.bristot@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.