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powerpc/ftrace: Use generic ftrace_modify_all_code()

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Convert powerpc's arch_ftrace_update_code() from its own version to use
the generic default functionality (without stop_machine -- our
instructions are properly aligned and the replacements atomic).

With this we gain error checking and the much-needed function_trace_op
handling.

Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Torsten Duwe <duwe@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Torsten Duwe 2016-03-03 15:26:57 +11:00 committed by Michael Ellerman
parent 336a7b5dd8
commit c96f83856f
1 changed files with 5 additions and 12 deletions
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17
arch/powerpc/kernel/ftrace.c
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@ -449,20 +449,13 @@ void ftrace_replace_code(int enable)
}
}
/*
* Use the default ftrace_modify_all_code, but without
* stop_machine().
*/
void arch_ftrace_update_code(int command)
{
if (command & FTRACE_UPDATE_CALLS)
ftrace_replace_code(1);
else if (command & FTRACE_DISABLE_CALLS)
ftrace_replace_code(0);
if (command & FTRACE_UPDATE_TRACE_FUNC)
ftrace_update_ftrace_func(ftrace_trace_function);
if (command & FTRACE_START_FUNC_RET)
ftrace_enable_ftrace_graph_caller();
else if (command & FTRACE_STOP_FUNC_RET)
ftrace_disable_ftrace_graph_caller();
ftrace_modify_all_code(command);
}
int __init ftrace_dyn_arch_init(void)