Fix MIPS n64 readahead (bug 21026).

As noted in bug 20126, MIPS n64 uses an incorrect implementation of
readahead intended for 32-bit systems.  This patch adds a
syscalls.list entry to fix this.  An updated version of the
consolidation patch
<https://sourceware.org/ml/libc-alpha/2016-09/msg00527.html> could
remove this syscalls.list entry again.

Tested with compilation (only) for mips64; the nature of the syscall
doesn't allow for a glibc test to detect this issue.

	[BZ #21026]
	* sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list
	(readahead): New syscall entry.

diff --git a/ChangeLog b/ChangeLog
index df77ffa..801bb3a 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-01-05  Joseph Myers  <joseph@codesourcery.com>
+
+       [BZ #21026]
+       * sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list
+       (readahead): New syscall entry.
+
 2017-01-04  Joseph Myers  <joseph@codesourcery.com>
 
        * string/tester.c (test_strncat): Disable -Wstringop-overflow=

diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list b/sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list
index 533f19d..5b5cfc2 100644 (file)
--- a/sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list
@@ -2,6 +2,8 @@
 
 mmap           -       mmap            b:aniiii __mmap         mmap __mmap64 mmap64
 
+readahead      -       readahead       i:iii   __readahead     readahead
+
 prlimit                EXTRA   prlimit64       i:iipp  prlimit         prlimit64
 
 fanotify_mark  EXTRA   fanotify_mark   i:iiiis fanotify_mark