Remove on_each_cpu() wrapper

The on_each_cpu() function has been available since Linux 2.6.27.
There is no longer a need to maintain this compatibility code.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

config/spl-build.m4

@@ -29,7 +29,6 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
 	SPL_AC_PDE_DATA
 	SPL_AC_MUTEX_OWNER
 	SPL_AC_MUTEX_OWNER_TASK_STRUCT
-	SPL_AC_3ARGS_ON_EACH_CPU
 	SPL_AC_KALLSYMS_LOOKUP_NAME
 	SPL_AC_GET_VMALLOC_INFO
 	SPL_AC_PGDAT_HELPERS
@@ -972,28 +971,6 @@ AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
 	EXTRA_KCFLAGS="$tmp_flags"
 ])
 
-dnl #
-dnl # 2.6.27 API change,
-dnl # on_each_cpu() uses 3 args, no 'retry' argument
-dnl #
-AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
-	AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
-	SPL_LINUX_TRY_COMPILE([
-		#include <linux/interrupt.h>
-		#include <linux/smp.h>
-
-		void on_each_cpu_func(void *data) { return; }
-	],[
-		on_each_cpu(on_each_cpu_func, NULL, 0);
-	],[
-		AC_MSG_RESULT(yes)
-		AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,
-		          [on_each_cpu wants 3 args])
-	],[
-		AC_MSG_RESULT(no)
-	])
-])
-
 dnl #
 dnl # 2.6.18 API change,
 dnl # kallsyms_lookup_name no longer exported

include/linux/Makefile.am

@@ -12,7 +12,6 @@ KERNEL_H = \
 	$(top_srcdir)/include/linux/module_compat.h \
 	$(top_srcdir)/include/linux/proc_compat.h \
 	$(top_srcdir)/include/linux/rwsem_compat.h \
-	$(top_srcdir)/include/linux/smp_compat.h \
 	$(top_srcdir)/include/linux/sysctl_compat.h \
 	$(top_srcdir)/include/linux/wait_compat.h \
 	$(top_srcdir)/include/linux/zlib_compat.h

include/linux/smp_compat.h

@@ -1,40 +0,0 @@
-/*****************************************************************************\
- *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
- *  Copyright (C) 2007 The Regents of the University of California.
- *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
- *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
- *  UCRL-CODE-235197
- *
- *  This file is part of the SPL, Solaris Porting Layer.
- *  For details, see <http://zfsonlinux.org/>.
- *
- *  The SPL is free software; you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License as published by the
- *  Free Software Foundation; either version 2 of the License, or (at your
- *  option) any later version.
- *
- *  The SPL 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 General Public License
- *  for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
-\*****************************************************************************/
-
-#ifndef _SPL_SMP_COMPAT_H
-#define _SPL_SMP_COMPAT_H
-
-#include <linux/smp.h>
-
-#ifdef HAVE_3ARGS_ON_EACH_CPU
-
-#define spl_on_each_cpu(func,info,wait)	on_each_cpu(func,info,wait)
-
-#else
-
-#define spl_on_each_cpu(func,info,wait)	on_each_cpu(func,info,0,wait)
-
-#endif /* HAVE_3ARGS_ON_EACH_CPU */
-
-#endif /* _SPL_SMP_COMPAT_H */

include/sys/types.h

@@ -31,7 +31,6 @@
 #include <linux/file_compat.h>
 #include <linux/list_compat.h>
 #include <linux/bitops_compat.h>
-#include <linux/smp_compat.h>
 #include <linux/kallsyms_compat.h>
 #include <linux/module_compat.h>
 #include <linux/sysctl_compat.h>

module/spl/spl-kmem.c

@@ -1391,7 +1391,7 @@ spl_cache_age(void *data)
 	atomic_inc(&skc->skc_ref);
 
 	if (!(skc->skc_flags & KMC_NOMAGAZINE))
-		spl_on_each_cpu(spl_magazine_age, skc, 1);
+		on_each_cpu(spl_magazine_age, skc, 1);
 
 	spl_slab_reclaim(skc, skc->skc_reap, 0);