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Add configure check for user_path_dir()

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I didn't notice at the time but user_path_dir() was not introduced
at the same time as set_fs_pwd() change.  I had lumped the two
together but in fact user_path_dir() was introduced in 2.6.27 and
set_fs_pwd() taking 2 args was introduced in 2.6.25.  This means
builds against 2.6.25-2.6.26 kernels were broken.

To fix this I've added a check for user_path_dir() and no longer
assume that if set_fs_pwd() takes 2 args then user_path_dir() is
also available.
This commit is contained in:
Brian Behlendorf
2010-07-01 13:37:43 -07:00
parent e2d28a3743
commit 7119bf7044
4 changed files with 116 additions and 1 deletions
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config/spl-build.m4
+14
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@@ -68,6 +68,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_ZONE_STAT_ITEM_INACTIVE
SPL_AC_ZONE_STAT_ITEM_ACTIVE
SPL_AC_GET_ZONE_COUNTS
SPL_AC_USER_PATH_DIR
SPL_AC_SET_FS_PWD
SPL_AC_2ARGS_SET_FS_PWD
SPL_AC_2ARGS_VFS_UNLINK
@@ -1298,6 +1299,19 @@ AC_DEFUN([SPL_AC_GET_ZONE_COUNTS], [
])
])
dnl #
dnl # 2.6.27 API change,
dnl # The user_path_dir() replaces __user_walk()
dnl #
AC_DEFUN([SPL_AC_USER_PATH_DIR], [
SPL_CHECK_SYMBOL_EXPORT(
[user_path_at],
[],
[AC_DEFINE(HAVE_USER_PATH_DIR, 1,
[user_path_dir() is available])],
[])
])
dnl #
dnl # Symbol available in RHEL kernels not in stock kernels.
dnl #