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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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b3f737ae95
sync_file_debug_add() and sync_file_debug_remove() have been unused
since 2016's
commit d4cab38e15 ("staging/android: prepare sync_file for de-staging")
Remove them.
Since sync_file_debug_add was the only thing to add to
sync_file_list_head, the code that dumps it in part of
sync_info_debugfs_show can be removed, and the declaration of
the list and it's associated lock can be removed.
(The 'fences:\n...' marker in that debugfs file is left in
so as not to change the output)
That leaves the sync_print_sync_file() helper unused, and
is thus removed.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250505233838.105668-1-linux@treblig.org
124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Sync File validation framework and debug information
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*
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* Copyright (C) 2012 Google, Inc.
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*/
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#include <linux/debugfs.h>
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#include "sync_debug.h"
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static struct dentry *dbgfs;
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static LIST_HEAD(sync_timeline_list_head);
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static DEFINE_SPINLOCK(sync_timeline_list_lock);
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void sync_timeline_debug_add(struct sync_timeline *obj)
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{
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unsigned long flags;
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spin_lock_irqsave(&sync_timeline_list_lock, flags);
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list_add_tail(&obj->sync_timeline_list, &sync_timeline_list_head);
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spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
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}
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void sync_timeline_debug_remove(struct sync_timeline *obj)
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{
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unsigned long flags;
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spin_lock_irqsave(&sync_timeline_list_lock, flags);
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list_del(&obj->sync_timeline_list);
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spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
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}
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static const char *sync_status_str(int status)
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{
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if (status < 0)
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return "error";
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if (status > 0)
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return "signaled";
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return "active";
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}
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static void sync_print_fence(struct seq_file *s,
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struct dma_fence *fence, bool show)
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{
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struct sync_timeline *parent = dma_fence_parent(fence);
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int status;
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status = dma_fence_get_status_locked(fence);
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seq_printf(s, " %s%sfence %s",
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show ? parent->name : "",
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show ? "_" : "",
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sync_status_str(status));
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if (test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags)) {
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struct timespec64 ts64 =
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ktime_to_timespec64(fence->timestamp);
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seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec);
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}
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seq_printf(s, ": %lld", fence->seqno);
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seq_printf(s, " / %d", parent->value);
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seq_putc(s, '\n');
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}
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static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj)
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{
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struct list_head *pos;
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seq_printf(s, "%s: %d\n", obj->name, obj->value);
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spin_lock(&obj->lock); /* Caller already disabled IRQ. */
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list_for_each(pos, &obj->pt_list) {
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struct sync_pt *pt = container_of(pos, struct sync_pt, link);
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sync_print_fence(s, &pt->base, false);
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}
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spin_unlock(&obj->lock);
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}
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static int sync_info_debugfs_show(struct seq_file *s, void *unused)
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{
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struct list_head *pos;
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seq_puts(s, "objs:\n--------------\n");
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spin_lock_irq(&sync_timeline_list_lock);
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list_for_each(pos, &sync_timeline_list_head) {
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struct sync_timeline *obj =
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container_of(pos, struct sync_timeline,
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sync_timeline_list);
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sync_print_obj(s, obj);
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seq_putc(s, '\n');
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}
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spin_unlock_irq(&sync_timeline_list_lock);
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seq_puts(s, "fences:\n--------------\n");
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(sync_info_debugfs);
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static __init int sync_debugfs_init(void)
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{
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dbgfs = debugfs_create_dir("sync", NULL);
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/*
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* The debugfs files won't ever get removed and thus, there is
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* no need to protect it against removal races. The use of
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* debugfs_create_file_unsafe() is actually safe here.
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*/
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debugfs_create_file_unsafe("info", 0444, dbgfs, NULL,
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&sync_info_debugfs_fops);
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debugfs_create_file_unsafe("sw_sync", 0644, dbgfs, NULL,
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&sw_sync_debugfs_fops);
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return 0;
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}
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late_initcall(sync_debugfs_init);
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