diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-12-30 10:14:15 -0500 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-01-05 19:46:51 -0500 |
| commit | e9666d10a5677a494260d60d1fa0b73cc7646eb3 (patch) | |
| tree | fd609e683efff32ed6cc1458e20c40969328a33e /arch/Kconfig | |
| parent | 72d3ebb929de339f991fc49b58942d2d5ecdb753 (diff) | |
jump_label: move 'asm goto' support test to Kconfig
Currently, CONFIG_JUMP_LABEL just means "I _want_ to use jump label".
The jump label is controlled by HAVE_JUMP_LABEL, which is defined
like this:
#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
# define HAVE_JUMP_LABEL
#endif
We can improve this by testing 'asm goto' support in Kconfig, then
make JUMP_LABEL depend on CC_HAS_ASM_GOTO.
Ugly #ifdef HAVE_JUMP_LABEL will go away, and CONFIG_JUMP_LABEL will
match to the real kernel capability.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index b70c952ac838..4cfb6de48f79 100644 --- a/arch/Kconfig +++ b/arch/Kconfig | |||
| @@ -71,6 +71,7 @@ config KPROBES | |||
| 71 | config JUMP_LABEL | 71 | config JUMP_LABEL |
| 72 | bool "Optimize very unlikely/likely branches" | 72 | bool "Optimize very unlikely/likely branches" |
| 73 | depends on HAVE_ARCH_JUMP_LABEL | 73 | depends on HAVE_ARCH_JUMP_LABEL |
| 74 | depends on CC_HAS_ASM_GOTO | ||
| 74 | help | 75 | help |
| 75 | This option enables a transparent branch optimization that | 76 | This option enables a transparent branch optimization that |
| 76 | makes certain almost-always-true or almost-always-false branch | 77 | makes certain almost-always-true or almost-always-false branch |