kernel: Only expose su when daemon is running

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / dcache.h

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index c1999d1fe6f8dd7deed810ed9cf18623bf10c3a6..65a8fb6c769c76af320a5e7a93611b743d727299 100644 (file)
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -410,6 +410,13 @@ static inline bool d_mountpoint(struct dentry *dentry)
        return dentry->d_flags & DCACHE_MOUNTED;
 }
 
+static inline bool d_is_su(const struct dentry *dentry)
+{
+       return dentry &&
+              dentry->d_name.len == 2 &&
+              !memcmp(dentry->d_name.name, "su", 2);
+}
+
 extern int sysctl_vfs_cache_pressure;
 
 #endif /* __LINUX_DCACHE_H */