40c2a0e3f6
Add an 'initialized' field to struct percpu_counter to track whether a counter has been properly initialized. Update percpu_counter_init() to set this field and percpu_counter_initialized() to check it. This is needed because ext4 uses percpu_counter_initialized() to check if counters are ready before accessing them. Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* A simple "approximate counter" for use in ext2 and ext3 superblocks.
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*
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* WARNING: these things are HUGE. 4 kbytes per counter on 32-way P4.
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*
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* Stub definitions for percpu counters.
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* U-Boot is single-threaded, use simple counters.
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*/
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#ifndef _LINUX_PERCPU_COUNTER_H
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#define _LINUX_PERCPU_COUNTER_H
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#include <linux/types.h>
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struct percpu_counter {
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s64 count;
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s64 counter; /* Alias for count - some code uses this name */
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bool initialized; /* Track if counter has been initialized */
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};
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static inline int percpu_counter_init(struct percpu_counter *fbc, s64 amount,
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gfp_t gfp)
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{
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fbc->count = amount;
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fbc->counter = amount;
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fbc->initialized = true;
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return 0;
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}
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static inline void percpu_counter_destroy(struct percpu_counter *fbc)
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{
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}
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static inline void percpu_counter_set(struct percpu_counter *fbc, s64 amount)
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{
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fbc->count = amount;
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}
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static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount)
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{
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fbc->count += amount;
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}
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static inline void percpu_counter_sub(struct percpu_counter *fbc, s64 amount)
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{
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fbc->count -= amount;
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}
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static inline void percpu_counter_inc(struct percpu_counter *fbc)
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{
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fbc->count++;
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}
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static inline void percpu_counter_dec(struct percpu_counter *fbc)
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{
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fbc->count--;
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}
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static inline s64 percpu_counter_read(struct percpu_counter *fbc)
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{
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return fbc->count;
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}
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static inline s64 percpu_counter_read_positive(struct percpu_counter *fbc)
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{
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return fbc->count > 0 ? fbc->count : 0;
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}
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static inline s64 percpu_counter_sum(struct percpu_counter *fbc)
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{
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return fbc->count;
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}
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static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc)
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{
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return fbc->count > 0 ? fbc->count : 0;
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}
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static inline bool percpu_counter_initialized(struct percpu_counter *fbc)
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{
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return fbc->initialized;
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}
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#endif /* _LINUX_PERCPU_COUNTER_H */
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