mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-17 18:11:00 +03:00
705741827a
This patch adds a new autoconf function: ZFS_LINUX_TRY_COMPILE_SYMBOL. This new function does the following: - Call LINUX_TRY_COMPILE with the specified parameters. - If unsuccessful, return false. - If successful and we're configuring with --enable-linux-builtin, return true. - Else, call CHECK_SYMBOL_EXPORT with the specified parameters and return the result. All calls to CHECK_SYMBOL_EXPORT are converted to LINUX_TRY_COMPILE_SYMBOL so that the tests work even when configuring for builtin on a kernel which doesn't have loadable module support, or hasn't been built yet. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #851
35 lines
1.3 KiB
Plaintext
35 lines
1.3 KiB
Plaintext
dnl #
|
|
dnl # 3.5.0 API change
|
|
dnl # torvalds/linux@dbd5768f87ff6fb0a4fe09c4d7b6c4a24de99430 and
|
|
dnl # torvalds/linux@7994e6f7254354e03028a11f98a27bd67dace9f1 reworked
|
|
dnl # where inode_sync_wait() is called.
|
|
dnl #
|
|
dnl # Prior to these changes it would occur in end_writeback() but due
|
|
dnl # to various issues (described in the above commits) it has been
|
|
dnl # moved to evict(). This changes the ordering is which sync occurs
|
|
dnl # but otherwise doesn't impact the zpl implementation.
|
|
dnl #
|
|
dnl # The major impact here is the renaming of end_writeback() to
|
|
dnl # clear_inode(). However, care must be taken when detecting this
|
|
dnl # API change because as recently as 2.6.35 there was a clear_inode()
|
|
dnl # function. However, it was made obsolete by the evict_inode() API
|
|
dnl # change at the same time.
|
|
dnl #
|
|
dnl # Therefore, to ensure we have the correct API we only allow the
|
|
dnl # clear_inode() compatibility code to be defined iff the evict_inode()
|
|
dnl # functionality is also detected.
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_KERNEL_CLEAR_INODE],
|
|
[AC_MSG_CHECKING([whether clear_inode() is available])
|
|
ZFS_LINUX_TRY_COMPILE_SYMBOL([
|
|
#include <linux/fs.h>
|
|
], [
|
|
clear_inode(NULL);
|
|
], [clear_inode], [fs/inode.c], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_CLEAR_INODE, 1, [clear_inode() is available])
|
|
], [
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
])
|