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e9666d10a5
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>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_JUMP_LABEL_RATELIMIT_H
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#define _LINUX_JUMP_LABEL_RATELIMIT_H
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#include <linux/jump_label.h>
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#include <linux/workqueue.h>
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#if defined(CONFIG_JUMP_LABEL)
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struct static_key_deferred {
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struct static_key key;
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unsigned long timeout;
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struct delayed_work work;
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};
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extern void static_key_slow_dec_deferred(struct static_key_deferred *key);
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extern void static_key_deferred_flush(struct static_key_deferred *key);
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extern void
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jump_label_rate_limit(struct static_key_deferred *key, unsigned long rl);
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#else /* !CONFIG_JUMP_LABEL */
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struct static_key_deferred {
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struct static_key key;
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};
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static inline void static_key_slow_dec_deferred(struct static_key_deferred *key)
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{
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STATIC_KEY_CHECK_USE(key);
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static_key_slow_dec(&key->key);
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}
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static inline void static_key_deferred_flush(struct static_key_deferred *key)
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{
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STATIC_KEY_CHECK_USE(key);
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}
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static inline void
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jump_label_rate_limit(struct static_key_deferred *key,
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unsigned long rl)
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{
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STATIC_KEY_CHECK_USE(key);
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}
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#endif /* CONFIG_JUMP_LABEL */
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#endif /* _LINUX_JUMP_LABEL_RATELIMIT_H */
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