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authorUlrich Drepper <drepper@redhat.com>2007-02-21 19:03:26 +0000
committerUlrich Drepper <drepper@redhat.com>2007-02-21 19:03:26 +0000
commit8889e7aa461ae71467783ca630638b474ad17d14 (patch)
tree75803292988e85f437527c1e4cd7fa3a0a46139e /sysdeps
parent63a2f30529aca7a97f84a7f2a6f8afc40f0a3cdb (diff)
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[BZ #3458]
* sysdeps/unix/sysv/linux/posix_madvise.c: New file. * sysdeps/unix/sysv/linux/syscalls.list: Remove posix_madvise entry. * stdio-common/tfformat.c (sprint_doubles): Some more tests.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/posix_madvise.c38
-rw-r--r--sysdeps/unix/sysv/linux/syscalls.list1
2 files changed, 38 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/posix_madvise.c b/sysdeps/unix/sysv/linux/posix_madvise.c
new file mode 100644
index 0000000000..d0e476b61e
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/posix_madvise.c
@@ -0,0 +1,38 @@
+/* Copyright (C) 2007 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#include <sys/mman.h>
+
+
+int
+posix_madvise (void *addr, size_t len, int advise)
+{
+ /* We have one problem: the kernel's MADV_DONTNEED does not
+ correspond to POSIX's POSIX_MADV_DONTNEED. The former simply
+ discards changes made to the memory without writing it back to
+ disk, if this would be necessary. The POSIX behavior does not
+ allow this. There is no functionality mapping the POSIX behavior
+ so far so we ignore that advise for now. */
+ if (advise == POSIX_MADV_DONTNEED)
+ return 0;
+
+ INTERNAL_SYSCALL_DECL (err);
+ int result = INTERNAL_SYSCALL (madvise, err, 3, addr, len, advise);
+ return INTERNAL_SYSCALL_ERRNO (result, err);
+}
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index 5776673733..38103f0c68 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -32,7 +32,6 @@ ioperm - ioperm i:iii ioperm
iopl - iopl i:i iopl
klogctl EXTRA syslog i:isi klogctl
lchown - lchown i:sii __lchown lchown
-posix_madvise - madvise Vi:pii posix_madvise
madvise - madvise i:pii madvise
mincore - mincore i:anV mincore
mlock - mlock i:bn mlock