diff options
| author | Sathvika Vasireddy <sv@linux.ibm.com> | 2022-11-14 18:57:49 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-11-18 09:00:16 +0100 |
| commit | 280981d6994e0700abd36647b141e73059851e66 (patch) | |
| tree | 9b1d8c765093a419269935e528e9e695f6e87e30 /kernel | |
| parent | objtool: Use target file class size instead of a compiled constant (diff) | |
| download | linux-280981d6994e0700abd36647b141e73059851e66.tar.xz linux-280981d6994e0700abd36647b141e73059851e66.zip | |
objtool: Add --mnop as an option to --mcount
Some architectures (powerpc) may not support ftrace locations being nop'ed
out at build time. Introduce CONFIG_HAVE_OBJTOOL_NOP_MCOUNT for objtool, as
a means for architectures to enable nop'ing of ftrace locations. Add --mnop
as an option to objtool --mcount, to indicate support for the same.
Also, make sure that --mnop can be passed as an option to objtool only when
--mcount is passed.
Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Sathvika Vasireddy <sv@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221114175754.1131267-12-sv@linux.ibm.com
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index e9e95c790b8e..2b782321376a 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -82,6 +82,13 @@ config HAVE_OBJTOOL_MCOUNT help Arch supports objtool --mcount +config HAVE_OBJTOOL_NOP_MCOUNT + bool + help + Arch supports the objtool options --mcount with --mnop. + An architecture can select this if it wants to enable nop'ing + of ftrace locations. + config HAVE_C_RECORDMCOUNT bool help |