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2020-09-21tracing: remove a pointless assignmentDan Carpenter1-1/+0
The "tr" is a stack variable so setting it to NULL before a return is a no-op. Delete the assignment. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-09-21kprobes: Use module_name() macroJarkko Sakkinen1-3/+4
It is advised to use module_name() macro instead of dereferencing mod->name directly. This makes sense for consistencys sake and also it prevents a hard dependency to CONFIG_MODULES. Link: https://lkml.kernel.org/r/20200818050857.117998-1-jarkko.sakkinen@linux.intel.com Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-mm@kvack.org Cc: Andi Kleen <ak@linux.intel.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Jessica Yu <jeyu@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com>, Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will@kernel.org> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-09-21tracing: Use __this_cpu_read() in trace_buffered_event_enable()Xianting Tian1-1/+1
The code is executed with preemption disabled, so it's safe to use __this_cpu_read(). Link: https://lkml.kernel.org/r/20200813112803.12256-1-tian.xianting@h3c.com Signed-off-by: Xianting Tian <tian.xianting@h3c.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-09-21tracing: Delete repeated words in commentsRandy Dunlap5-5/+5
Drop repeated words in kernel/trace/. {and, the, not} Link: https://lkml.kernel.org/r/20200807033259.13778-1-rdunlap@infradead.org Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-09-18tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointerWei Yang11-61/+57
Current tracing_init_dentry() return a d_entry pointer, while is not necessary. This function returns NULL on success or error on failure, which means there is no valid d_entry pointer return. Let's return 0 on success and negative value for error. Link: https://lkml.kernel.org/r/20200712011036.70948-5-richard.weiyang@linux.alibaba.com Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-09-18tracing: toplevel d_entry already initializedWei Yang1-7/+2
Currently we have following call flow: tracer_init_tracefs() tracing_init_dentry() event_trace_init() tracing_init_dentry() This shows tracing_init_dentry() is called twice in this flow and this is not necessary. Let's remove the second one when it is for sure be properly initialized. Link: https://lkml.kernel.org/r/20200712011036.70948-4-richard.weiyang@linux.alibaba.com Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-09-18tools/bootconfig: Add --init option for bconf2ftrace.shMasami Hiramatsu2-1/+120
Since the ftrace current setting may conflict with the new setting from bootconfig, add the --init option to initialize ftrace before setting for bconf2ftrace.sh. E.g. $ bconf2ftrace.sh --init boottrace.bconf This initialization method copied from selftests/ftrace. Link: https://lkml.kernel.org/r/159704853203.175360.17029578033994278231.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>