mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Lorenzo Stoakes
9a6a6a3191
Commit857d18f23a("cleanup: Introduce ACQUIRE() and ACQUIRE_ERR() for conditional locks") accidentally broke the radix tree, VMA userland tests by including linux/args.h which is not present in the tools/include directory. This patch copies this over and adds an #ifdef block to avoid duplicate __CONCAT declaration in conflict with system headers when we ultimately include this. Link: https://lkml.kernel.org/r/[email protected] Fixes:857d18f23a("cleanup: Introduce ACQUIRE() and ACQUIRE_ERR() for conditional locks") Signed-off-by: Lorenzo Stoakes <[email protected]> Cc: Jann Horn <[email protected]> Cc: John Hubbard <[email protected]> Cc: Liam Howlett <[email protected]> Cc: Sidhartha Kumar <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: Dan Williams <[email protected]> Cc: Peter Zijlstra <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
29 lines
1021 B
C
29 lines
1021 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_ARGS_H
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#define _LINUX_ARGS_H
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/*
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* How do these macros work?
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*
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* In __COUNT_ARGS() _0 to _12 are just placeholders from the start
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* in order to make sure _n is positioned over the correct number
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* from 12 to 0 (depending on X, which is a variadic argument list).
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* They serve no purpose other than occupying a position. Since each
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* macro parameter must have a distinct identifier, those identifiers
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* are as good as any.
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*
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* In COUNT_ARGS() we use actual integers, so __COUNT_ARGS() returns
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* that as _n.
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*/
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/* This counts to 15. Any more, it will return 16th argument. */
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#define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _n, X...) _n
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#define COUNT_ARGS(X...) __COUNT_ARGS(, ##X, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
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/* Concatenate two parameters, but allow them to be expanded beforehand. */
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#define __CONCAT(a, b) a ## b
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#define CONCATENATE(a, b) __CONCAT(a, b)
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#endif /* _LINUX_ARGS_H */
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