5ed072d603
Move mutex definitions from compat.h to a dedicated mutex.h header, matching the Linux structure. U-Boot is single-threaded so mutexes are no-ops. The new header provides struct mutex and mutex_init/lock/unlock stubs. Update compat.h to include linux/mutex.h. Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
32 lines
863 B
C
32 lines
863 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Mutexes: blocking mutual exclusion locks
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*
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* Minimal version for U-Boot ext4l - based on Linux 6.18
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* U-Boot is single-threaded so these are mostly no-ops.
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*/
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#ifndef __LINUX_MUTEX_H
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#define __LINUX_MUTEX_H
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#include <linux/types.h>
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/*
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* Simple mutex for U-Boot (single-threaded, so these are no-ops)
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*/
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struct mutex {
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int locked;
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};
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/* No-op macros that don't reference argument - for backward compatibility */
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#define DEFINE_MUTEX(name) struct mutex name = { .locked = 0 }
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#define mutex_init(lock) do { } while (0)
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#define mutex_lock(lock) do { } while (0)
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#define mutex_unlock(lock) do { } while (0)
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#define mutex_trylock(lock) ({ 1; })
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#define mutex_is_locked(lock) ({ 0; })
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#define mutex_destroy(lock) do { } while (0)
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#define __MUTEX_INITIALIZER(lockname) { .locked = 0 }
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#endif /* __LINUX_MUTEX_H */
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