mdev: suppress aliasing warning

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 4b4eeafba..5ad09e09a 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -808,6 +808,16 @@ static void make_device(char *device_name, char *path, int operation)
         } /* for (;;) */
 }
 
+static ssize_t readlink2(char *buf, size_t bufsize)
+{
+        // Grr... gcc 8.1.1:
+        // "passing argument 2 to restrict-qualified parameter aliases with argument 1"
+        // dance around that...
+        char *obuf FIX_ALIASING;
+        obuf = buf;
+        return readlink(buf, obuf, bufsize);
+}
+
 /* File callback for /sys/ traversal.
  * We act only on "/sys/.../dev" (pseudo)file
  */
@@ -831,7 +841,7 @@ static int FAST_FUNC fileAction(const char *fileName,
         /* Read ".../subsystem" symlink in the same directory where ".../dev" is */
         strcpy(subsys, path);
         strcpy(subsys + len, "/subsystem");
-        res = readlink(subsys, subsys, sizeof(subsys)-1);
+        res = readlink2(subsys, sizeof(subsys)-1);
         if (res > 0) {
                 subsys[res] = '\0';
                 free(G.subsystem);