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| author | Bjoern A. Zeeb <bz@FreeBSD.org> | 2024-09-28 22:38:03 +0000 |
|---|---|---|
| committer | Bjoern A. Zeeb <bz@FreeBSD.org> | 2024-10-14 17:45:42 +0000 |
| commit | fa81baa307da9a0055d7d08f6d141ea310f067ed (patch) | |
| tree | f6604557ae6ddbeaa3afcf0df2ab063a25e04914 /sys/compat/linuxkpi/common | |
| parent | e69e172d40585cfbcfdb28433cec523ca4867cf1 (diff) | |
| download | src-fa81baa307da9a0055d7d08f6d141ea310f067ed.tar.gz src-fa81baa307da9a0055d7d08f6d141ea310f067ed.zip | |
LinuxKPI: add cleanup.h for guard DEFINE_GUARD/guard.
iwlwifi v6.11 started to use guard(). _T in the implementation needs
to be exposed to the driver which uses it in DEFINE_GUARD().
Given this is the first instance of attribute(cleanup) in the tree:
- gcc has support for it since at least 2003-06-04
(0bfa5f65bfb186f10d43304946fd7fcd69988732)
- llvm gained support on 2009-01-31
(d277d790e0f6f23043397ba919619b5c3e157ff3, llvm-svn 63462).
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D46843
Diffstat (limited to 'sys/compat/linuxkpi/common')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/cleanup.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/cleanup.h b/sys/compat/linuxkpi/common/include/linux/cleanup.h new file mode 100644 index 000000000000..01f234f0cbe7 --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/cleanup.h @@ -0,0 +1,46 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2024 The FreeBSD Foundation + * + * This software was developed by Björn Zeeb under sponsorship from + * the FreeBSD Foundation. + */ + +#ifndef _LINUXKPI_LINUX_CLEANUP_H +#define _LINUXKPI_LINUX_CLEANUP_H + +#define __cleanup(_f) __attribute__((__cleanup__(_f))) + +/* + * Note: "_T" are special as they are exposed into common code for + * statements. Extra care should be taken when changing the code. + */ +#define DEFINE_GUARD(_n, _dt, _lock, _unlock) \ + \ + typedef _dt guard_ ## _n ## _t; \ + \ + static inline _dt \ + guard_ ## _n ## _create( _dt _T) \ + { \ + _dt c; \ + \ + c = ({ _lock; _T; }); \ + return (c); \ + } \ + \ + static inline void \ + guard_ ## _n ## _destroy(_dt *t) \ + { \ + _dt _T; \ + \ + _T = *t; \ + if (_T) { _unlock; }; \ + } + +/* We need to keep these calls unique. */ +#define guard(_n) \ + guard_ ## _n ## _t guard_ ## _n ## _ ## __COUNTER__ \ + __cleanup(guard_ ## _n ## _destroy) = guard_ ## _n ## _create + +#endif /* _LINUXKPI_LINUX_CLEANUP_H */ |