[PATCH] uapi: add EROBLK

[Alexey Dobriyan <adobriyan@gmail.com>]

Block drivers and DM sometimes use EROFS to report errors. There is
no confusion about what happens but naive error reporting code might
pass -EROFS to strerror(3) which will print "filesystem" when clearly
there is no filesystem anywhere, it is layer above.

Or in other words, if EROFS exists, why not EROBLK?
It is not like there is a tax on errno values.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

 include/uapi/asm-generic/errno.h |    1 +
 1 file changed, 1 insertion(+)

--- a/include/uapi/asm-generic/errno.h
+++ b/include/uapi/asm-generic/errno.h
@@ -119,5 +119,6 @@
 #define ERFKILL		132	/* Operation not possible due to RF-kill */
 
 #define EHWPOISON	133	/* Memory page has hardware error */
+#define EROBLK		134	/* Block device is read-only */
 
 #endif