diff options
Diffstat (limited to 'kernel/kcov.c')
| -rw-r--r-- | kernel/kcov.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/kernel/kcov.c b/kernel/kcov.c index c2277dbdbfb1..2ee38727844a 100644 --- a/kernel/kcov.c +++ b/kernel/kcov.c @@ -20,6 +20,7 @@ #include <linux/debugfs.h> #include <linux/uaccess.h> #include <linux/kcov.h> +#include <linux/refcount.h> #include <asm/setup.h> /* Number of 64-bit words written per one comparison: */ @@ -44,7 +45,7 @@ struct kcov { * - opened file descriptor * - task with enabled coverage (we can't unwire it from another task) */ - atomic_t refcount; + refcount_t refcount; /* The lock protects mode, size, area and t. */ spinlock_t lock; enum kcov_mode mode; @@ -228,12 +229,12 @@ EXPORT_SYMBOL(__sanitizer_cov_trace_switch); static void kcov_get(struct kcov *kcov) { - atomic_inc(&kcov->refcount); + refcount_inc(&kcov->refcount); } static void kcov_put(struct kcov *kcov) { - if (atomic_dec_and_test(&kcov->refcount)) { + if (refcount_dec_and_test(&kcov->refcount)) { vfree(kcov->area); kfree(kcov); } @@ -312,7 +313,7 @@ static int kcov_open(struct inode *inode, struct file *filep) if (!kcov) return -ENOMEM; kcov->mode = KCOV_MODE_DISABLED; - atomic_set(&kcov->refcount, 1); + refcount_set(&kcov->refcount, 1); spin_lock_init(&kcov->lock); filep->private_data = kcov; return nonseekable_open(inode, filep); @@ -444,10 +445,8 @@ static int __init kcov_init(void) * there is no need to protect it against removal races. The * use of debugfs_create_file_unsafe() is actually safe here. */ - if (!debugfs_create_file_unsafe("kcov", 0600, NULL, NULL, &kcov_fops)) { - pr_err("failed to create kcov in debugfs\n"); - return -ENOMEM; - } + debugfs_create_file_unsafe("kcov", 0600, NULL, NULL, &kcov_fops); + return 0; } |