package/busybox/patches/480-mount_union.patch

   1 --- a/util-linux/mount.c
   2 +++ b/util-linux/mount.c
   3 @@ -42,6 +42,10 @@
   4  #define MS_DIRSYNC      128     // Directory modifications are synchronous
   5  #endif
   6
   7 +#ifndef MS_UNION
   8 +#define MS_UNION       0x100   /* 256: Mount on top of a union */
   9 +#endif
  10 +
  11
  12  #if defined(__dietlibc__)
  13  // 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
  14 @@ -152,6 +156,7 @@ static const int32_t mount_options[] = {
  15                 /* "rslave"      */ MS_SLAVE|MS_RECURSIVE,
  16                 /* "rprivate"    */ MS_SLAVE|MS_RECURSIVE,
  17                 /* "runbindable" */ MS_UNBINDABLE|MS_RECURSIVE,
  18 +               /* "union"       */ MS_UNION,
  19         )
  20
  21         // Always understood.
  22 @@ -206,6 +211,7 @@ static const char mount_option_str[] =
  23                 "rslave\0"
  24                 "rprivate\0"
  25                 "runbindable\0"
  26 +               "union" "\0"
  27         )
  28
  29         // Always understood.