fs: dcache reduce locking in d_alloc (89ad485f) · Commits · e / devices / android_kernel_fairphone_FP4

fs/dcache.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -1253,11 +1253,13 @@ struct dentry d_alloc(struct dentry parent, const struct qstr *name)

		if (parent) {
		spin_lock(&parent->d_lock);
		spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
		/*
		* don't need child lock because it is not subject
		* to concurrency here
		*/
		dentry->d_parent = dget_dlock(parent);
		dentry->d_sb = parent->d_sb;
		list_add(&dentry->d_u.d_child, &parent->d_subdirs);
		spin_unlock(&dentry->d_lock);
		spin_unlock(&parent->d_lock);
		}