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23ba22557a
[ Upstream commit ca8e45c8048a2c9503c74751d25414601f730580 ] The arch_jump_label_transform_static() function in csky was originally meant to override the generic __weak function, but that got changed to an #ifndef check. This showed up as a missing-prototype warning: arch/csky/kernel/jump_label.c:43:6: error: no previous prototype for 'arch_jump_label_transform_static' [-Werror=missing-prototypes] Change the method to use the new method of having a #define and a prototype for the global function. Fixes:7e6b9db27d("jump_label: make initial NOP patching the special case") Fixes:4e8bb4ba5a("csky: Add jump-label implementation") Reviewed-by: Guo Ren <guoren@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __ASM_CSKY_JUMP_LABEL_H
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#define __ASM_CSKY_JUMP_LABEL_H
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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#define JUMP_LABEL_NOP_SIZE 4
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static __always_inline bool arch_static_branch(struct static_key *key,
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bool branch)
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{
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asm_volatile_goto(
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"1: nop32 \n"
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" .pushsection __jump_table, \"aw\" \n"
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" .align 2 \n"
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" .long 1b - ., %l[label] - . \n"
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" .long %0 - . \n"
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" .popsection \n"
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: : "i"(&((char *)key)[branch]) : : label);
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return false;
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label:
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return true;
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}
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static __always_inline bool arch_static_branch_jump(struct static_key *key,
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bool branch)
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{
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asm_volatile_goto(
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"1: bsr32 %l[label] \n"
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" .pushsection __jump_table, \"aw\" \n"
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" .align 2 \n"
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" .long 1b - ., %l[label] - . \n"
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" .long %0 - . \n"
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" .popsection \n"
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: : "i"(&((char *)key)[branch]) : : label);
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return false;
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label:
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return true;
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}
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enum jump_label_type;
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void arch_jump_label_transform_static(struct jump_entry *entry,
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enum jump_label_type type);
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#define arch_jump_label_transform_static arch_jump_label_transform_static
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_CSKY_JUMP_LABEL_H */
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