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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2018-04-19 10:04:09 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-03 15:32:29 +0300 |
| commit | ae30cc05bed2fd7eb05e4fb53f412783f05ccb7b (patch) | |
| tree | b4293c28d14cb058d79585c44e5e60383df213a5 /arch/powerpc/include/asm/module.h | |
| parent | 9ef404236438bf4934386dc2aa34ba7f0a9e1934 (diff) | |
| download | linux-ae30cc05bed2fd7eb05e4fb53f412783f05ccb7b.tar.xz | |
powerpc64/ftrace: Implement support for ftrace_regs_caller()
With -mprofile-kernel, we always save the full register state in
ftrace_caller(). While this works, this is inefficient if we're not
interested in the register state, such as when we're using the function
tracer.
Rename the existing ftrace_caller() as ftrace_regs_caller() and provide
a simpler implementation for ftrace_caller() that is used when registers
are not required to be saved.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/module.h')
| -rw-r--r-- | arch/powerpc/include/asm/module.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/module.h b/arch/powerpc/include/asm/module.h index 4f6573934792..18f7214d68b7 100644 --- a/arch/powerpc/include/asm/module.h +++ b/arch/powerpc/include/asm/module.h @@ -53,6 +53,9 @@ struct mod_arch_specific { #ifdef CONFIG_DYNAMIC_FTRACE unsigned long toc; unsigned long tramp; +#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS + unsigned long tramp_regs; +#endif #endif /* For module function descriptor dereference */ |