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Linux 3.9 compat: set_fs_root takes const struct path *

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torvalds/linux@dcf787f391 enforces
const-correctness in passing struct path *.

Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Richard Yao 2013-03-04 00:24:04 -05:00 committed by Brian Behlendorf
parent 2a305c34c8
commit a54718cfe0
2 changed files with 48 additions and 0 deletions
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44
config/spl-build.m4
View File

@ -64,6 +64,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_USER_PATH_DIR
SPL_AC_SET_FS_PWD
SPL_AC_2ARGS_SET_FS_PWD
SPL_AC_SET_FS_PWD_WITH_CONST
SPL_AC_2ARGS_VFS_UNLINK
SPL_AC_4ARGS_VFS_RENAME
SPL_AC_VFS_FSYNC
@ -1686,11 +1687,54 @@ AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
[set_fs_pwd() wants 2 args])
HAVE_2ARGS_SET_FS_PWD=yes
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.9 API change
dnl # set_fs_pwd takes const struct path *
dnl #
AC_DEFUN([SPL_AC_SET_FS_PWD_WITH_CONST],
if test "x$HAVE_2ARGS_SET_FS_PWD" = xyes; then
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
[AC_MSG_CHECKING([whether set_fs_pwd() requires const struct path *])
SPL_LINUX_TRY_COMPILE([
#include <linux/spinlock.h>
#include <linux/fs_struct.h>
#include <linux/path.h>
void (*const set_fs_pwd_func)
(struct fs_struct *, const struct path *)
= set_fs_pwd;
],[
return 0;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SET_FS_PWD_WITH_CONST, 1,
[set_fs_pwd() needs const path *])
],[
SPL_LINUX_TRY_COMPILE([
#include <linux/spinlock.h>
#include <linux/fs_struct.h>
#include <linux/path.h>
void (*const set_fs_pwd_func)
(struct fs_struct *, struct path *)
= set_fs_pwd;
],[
return 0;
],[
AC_MSG_RESULT(no)
],[
AC_MSG_ERROR(unknown)
])
])
EXTRA_KCFLAGS="$tmp_flags"
fi
])
dnl #
dnl # SLES API change, never adopted in mainline,
dnl # Third 'struct vfsmount *' argument removed.

4
module/spl/spl-vnode.c
View File

@ -840,7 +840,11 @@ EXPORT_SYMBOL(releasef);
# ifdef HAVE_2ARGS_SET_FS_PWD
/* Used from 2.6.25 - 2.6.31+ */
void
# ifdef HAVE_SET_FS_PWD_WITH_CONST
set_fs_pwd(struct fs_struct *fs, const struct path *path)
# else
set_fs_pwd(struct fs_struct *fs, struct path *path)
# endif
{
struct path old_pwd;