sh: Define missing __NR_readahead.

For some reason sh was missing __NR_readahead, even though the
syscall was wired up, and the slot was reserved. Caught with
dwmw2's missing syscall checker.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-sh/unistd.h b/include/asm-sh/unistd.h
index 17f527bfd455..49be50a36b77 100644
--- a/include/asm-sh/unistd.h
+++ b/include/asm-sh/unistd.h
@@ -233,6 +233,7 @@
 #define __NR_fcntl64            221
 /* 223 is unused */
 #define __NR_gettid             224
+#define __NR_readahead          225
 #define __NR_setxattr           226
 #define __NR_lsetxattr          227
 #define __NR_fsetxattr          228