166dcda718
Add stub headers to support ext4l filesystem compilation: New headers: - bit_spinlock.h: bit-based spinlock stubs - blkdev.h: block device structures and operations - buffer_head.h: buffer head management with state functions - crc32c.h: CRC32C checksum stub - fs.h: filesystem structures (super_block, inode operations) - journal-head.h: journal buffer head structure - mutex.h: mutex stubs Updates to existing headers: - compat.h: add rcu_head callback structure - jbd2.h: add wait.h and init.h includes for types - sched.h: add current task stub - workqueue.h: fix flush_work macro warning These provide the minimal Linux kernel interfaces needed for ext4 code to compile in U-Boot's single-threaded environment. Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
45 lines
928 B
C
45 lines
928 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* bit-based spin_lock()
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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 simplified.
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*/
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#ifndef __LINUX_BIT_SPINLOCK_H
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#define __LINUX_BIT_SPINLOCK_H
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#include <linux/bitops.h>
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/*
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* bit-based spin_lock() - U-Boot single-threaded version
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*/
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static inline void bit_spin_lock(int bitnum, unsigned long *addr)
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{
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set_bit(bitnum, addr);
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}
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static inline int bit_spin_trylock(int bitnum, unsigned long *addr)
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{
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if (test_bit(bitnum, addr))
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return 0;
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set_bit(bitnum, addr);
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return 1;
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}
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static inline void bit_spin_unlock(int bitnum, unsigned long *addr)
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{
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clear_bit(bitnum, addr);
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}
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static inline void __bit_spin_unlock(int bitnum, unsigned long *addr)
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{
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clear_bit(bitnum, addr);
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}
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static inline int bit_spin_is_locked(int bitnum, unsigned long *addr)
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{
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return test_bit(bitnum, addr);
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}
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#endif /* __LINUX_BIT_SPINLOCK_H */
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