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jump_label: move 'asm goto' support test to Kconfig

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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>
This commit is contained in:
Masahiro Yamada
2018-12-31 00:14:15 +09:00
parent 72d3ebb929
commit e9666d10a5
42 changed files with 65 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/jump_label_ratelimit.h
View File

@@ -5,21 +5,19 @@
#include <linux/jump_label.h>
#include <linux/workqueue.h>
#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
#if defined(CONFIG_JUMP_LABEL)
struct static_key_deferred {
struct static_key key;
unsigned long timeout;
struct delayed_work work;
};
#endif
#ifdef HAVE_JUMP_LABEL
extern void static_key_slow_dec_deferred(struct static_key_deferred *key);
extern void static_key_deferred_flush(struct static_key_deferred *key);
extern void
jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl);
#else /* !HAVE_JUMP_LABEL */
#else /* !CONFIG_JUMP_LABEL */
struct static_key_deferred {
struct static_key key;
};
@@ -38,5 +36,5 @@ jump_label_rate_limit(struct static_key_deferred *key,
{
STATIC_KEY_CHECK_USE(key);
}
#endif /* HAVE_JUMP_LABEL */
#endif /* CONFIG_JUMP_LABEL */
#endif /* _LINUX_JUMP_LABEL_RATELIMIT_H */