5d0c9b0eb8
The comment in 'asm-generic/bitops.h' states that you should "recode these in the native assembly language, if at all possible". This is pretty crappy advice now that the generic implementation is defined in terms of atomic_long_t rather than a spinlock, so update the comment and hopefully save future architecture maintainers a bit of work. Reported-by: Stefan Asserhall <stefana@xilinx.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200213093927.1836-1-will@kernel.org
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_GENERIC_BITOPS_H
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#define __ASM_GENERIC_BITOPS_H
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/*
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* For the benefit of those who are trying to port Linux to another
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* architecture, here are some C-language equivalents. They should
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* generate reasonable code, so take a look at what your compiler spits
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* out before rolling your own buggy implementation in assembly language.
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*
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* C language equivalents written by Theodore Ts'o, 9/26/92
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*/
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#include <linux/irqflags.h>
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#include <linux/compiler.h>
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#include <asm/barrier.h>
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#include <asm-generic/bitops/__ffs.h>
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#include <asm-generic/bitops/ffz.h>
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#include <asm-generic/bitops/fls.h>
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#include <asm-generic/bitops/__fls.h>
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#include <asm-generic/bitops/fls64.h>
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#include <asm-generic/bitops/find.h>
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#ifndef _LINUX_BITOPS_H
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#error only <linux/bitops.h> can be included directly
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#endif
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#include <asm-generic/bitops/sched.h>
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#include <asm-generic/bitops/ffs.h>
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#include <asm-generic/bitops/hweight.h>
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#include <asm-generic/bitops/lock.h>
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#include <asm-generic/bitops/atomic.h>
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#include <asm-generic/bitops/non-atomic.h>
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#include <asm-generic/bitops/le.h>
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#include <asm-generic/bitops/ext2-atomic.h>
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#endif /* __ASM_GENERIC_BITOPS_H */
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