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dma-buf/sw_sync: sw_sync register as misc devices

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Because the kernel debug fs will removed from android 11, so we move
sw_sync to misc devices, as android lib sync has done the compatibility
work, so after this commit, the hwc there is no need to update.

Signed-off-by: Huang Jiachai <hjc@rock-chips.com>
Change-Id: I799b66b1ba98c9370893b9554095664010b635df
This commit is contained in:
Huang Jiachai
2020-02-11 15:48:51 +08:00
committed by Tao Huang
parent c631006b69
commit da8f900b52
4 changed files with 21 additions and 1 deletions
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1
drivers/dma-buf/Kconfig
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@@ -21,7 +21,6 @@ config SW_SYNC
bool "Sync File Validation Framework"
default n
depends on SYNC_FILE
depends on DEBUG_FS
help
A sync object driver that uses a 32bit counter to coordinate
synchronization. Useful when there is no hardware primitive backing

12
drivers/dma-buf/sw_sync.c
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@@ -7,6 +7,8 @@
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/sync_file.h>
@@ -410,3 +412,13 @@ const struct file_operations sw_sync_debugfs_fops = {
.unlocked_ioctl = sw_sync_ioctl,
.compat_ioctl = compat_ptr_ioctl,
};
static struct miscdevice sw_sync_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = "sw_sync",
.fops = &sw_sync_debugfs_fops,
};
module_misc_device(sw_sync_dev);
MODULE_LICENSE("GPL v2");

2
drivers/dma-buf/sync_debug.c
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@@ -8,6 +8,7 @@
#include <linux/debugfs.h>
#include "sync_debug.h"
#ifdef CONFIG_DEBUG_FS
static struct dentry *dbgfs;
static LIST_HEAD(sync_timeline_list_head);
@@ -188,3 +189,4 @@ static __init int sync_debugfs_init(void)
return 0;
}
late_initcall(sync_debugfs_init);
#endif

7
drivers/dma-buf/sync_debug.h
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@@ -62,11 +62,18 @@ struct sync_pt {
struct rb_node node;
};
#ifdef CONFIG_DEBUG_FS
extern const struct file_operations sw_sync_debugfs_fops;
void sync_timeline_debug_add(struct sync_timeline *obj);
void sync_timeline_debug_remove(struct sync_timeline *obj);
void sync_file_debug_add(struct sync_file *fence);
void sync_file_debug_remove(struct sync_file *fence);
#else
static inline void sync_timeline_debug_add(struct sync_timeline *obj) {}
static inline void sync_timeline_debug_remove(struct sync_timeline *obj) {}
static inline void sync_file_debug_add(struct sync_file *fence) {}
static inline void sync_file_debug_remove(struct sync_file *fence) {}
#endif
#endif /* _LINUX_SYNC_H */