write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/mm/msync.c
..
..
@@ -57,7 +57,7 @@
57
57
 	 * If the interval [start,end) covers some unmapped address ranges,
58
58
 	 * just ignore them, but return -ENOMEM at the end.
59
59
 	 */
60
-	down_read(&mm->mmap_sem);
60
+	mmap_read_lock(mm);
61
61
 	vma = find_vma(mm, start);
62
62
 	for (;;) {
63
63
 		struct file *file;
..
..
@@ -88,12 +88,12 @@
88
88
 		if ((flags & MS_SYNC) && file &&
89
89
 				(vma->vm_flags & VM_SHARED)) {
90
90
 			get_file(file);
91
-			up_read(&mm->mmap_sem);
91
+			mmap_read_unlock(mm);
92
92
 			error = vfs_fsync_range(file, fstart, fend, 1);
93
93
 			fput(file);
94
94
 			if (error || start >= end)
95
95
 				goto out;
96
-			down_read(&mm->mmap_sem);
96
+			mmap_read_lock(mm);
97
97
 			vma = find_vma(mm, start);
98
98
 		} else {
99
99
 			if (start >= end) {
..
..
@@ -104,7 +104,7 @@
104
104
 		}
105
105
 	}
106
106
 out_unlock:
107
-	up_read(&mm->mmap_sem);
107
+	mmap_read_unlock(mm);
108
108
 out:
109
109
 	return error ? : unmapped_error;
110
110
 }