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Remove spl_invalidate_inodes()

Browse Source 
This functionality is no longer required by ZFS, see commit
zfsonlinux/zfs@7b3e34ba5a.
Since there are no other consumers, and because it adds
additional autoconf complexity which must be maintained
the spl_invalidate_inodes() function has been removed.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue zfsonlinux/zfs#795
This commit is contained in:
Brian Behlendorf
2013-01-17 11:33:24 -08:00
parent d4899f4747
commit 84dd1f4f15
3 changed files with 0 additions and 116 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/spl-build.m4
-74
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@@ -76,8 +76,6 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_5ARGS_PROC_HANDLER
SPL_AC_KVASPRINTF
SPL_AC_EXPORTED_RWSEM_IS_LOCKED
SPL_AC_KERNEL_INVALIDATE_INODES
SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES
SPL_AC_KERNEL_FALLOCATE
SPL_AC_SHRINK_DCACHE_MEMORY
SPL_AC_SHRINK_ICACHE_MEMORY
@@ -2036,78 +2034,6 @@ AC_DEFUN([SPL_AC_EXPORTED_RWSEM_IS_LOCKED],
])
])
dnl #
dnl # 2.6.37 API compat,
dnl # The function invalidate_inodes() is no longer exported by the kernel.
dnl # The prototype however is still available which means it is safe
dnl # to acquire the symbol's address using spl_kallsyms_lookup_name().
dnl #
dnl # The Proxmox VE kernel contains a patch which renames the function
dnl # invalidate_inodes() to invalidate_inodes_check(). In the process
dnl # it adds a 'check' argument and a '#define invalidate_inodes(x)'
dnl # compatibility wrapper for legacy callers. Therefore, if either
dnl # of these functions are exported invalidate_inodes() can be
dnl # safely used.
dnl #
AC_DEFUN([SPL_AC_KERNEL_INVALIDATE_INODES], [
AC_MSG_CHECKING([whether invalidate_inodes() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/fs.h>
], [
invalidate_inodes;
], [invalidate_inodes], [], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INVALIDATE_INODES, 1,
[invalidate_inodes() is available])
], [
AC_MSG_RESULT(no)
])
AC_MSG_CHECKING([whether invalidate_inodes_check() is available])
SPL_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/fs.h>
#ifndef invalidate_inodes
#error invalidate_inodes is not a macro
#endif
], [ ], [invalidate_inodes_check], [], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INVALIDATE_INODES_CHECK, 1,
[invalidate_inodes_check() is available])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.39 API compat,
dnl # The function invalidate_inodes() now take 2 arguments. The second
dnl # 'kill_dirty' argument describes how invalidate_inodes() should
dnl # handle dirty inodes. Only when set will dirty inodes be discarded,
dnl # otherwise they will be handled as busy.
dnl #
dnl # Unfortunately, we don't have access to the invalidate_inodes()
dnl # prototype so it's not easy to check how many arguments it takes.
dnl # However, this change was done for the benefit of invalidate_device()
dnl # which also added an argument. The invalidate_device() symbol does
dnl # exist in the development headers so if it takes two arguments we
dnl # can fairly safely infer that invalidate_inodes() takes two arguments
dnl # as well. See commit 93b270f76e7ef3b81001576860c2701931cdc78b.
dnl #
AC_DEFUN([SPL_AC_KERNEL_2ARGS_INVALIDATE_INODES],
[AC_MSG_CHECKING([whether invalidate_inodes() wants 2 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
return __invalidate_device(NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_INVALIDATE_INODES, 1,
[invalidate_inodes() wants 2 args])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.xx API compat,
dnl # There currently exists no exposed API to partially shrink the dcache.