From 5a0e3ad6af8660be21ca98a971cd00f331318c05 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Wed, 24 Mar 2010 17:04:11 +0900
Subject: include cleanup: Update gfp.h and slab.h includes to prepare for
 breaking implicit slab.h inclusion from percpu.h

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
---
 mm/bootmem.c        | 1 +
 mm/bounce.c         | 1 +
 mm/failslab.c       | 1 -
 mm/filemap.c        | 2 +-
 mm/filemap_xip.c    | 1 +
 mm/hugetlb.c        | 2 +-
 mm/kmemcheck.c      | 1 -
 mm/kmemleak.c       | 1 -
 mm/memory-failure.c | 1 +
 mm/memory.c         | 1 +
 mm/mempolicy.c      | 1 -
 mm/migrate.c        | 1 +
 mm/mincore.c        | 2 +-
 mm/mmu_notifier.c   | 1 +
 mm/mprotect.c       | 1 -
 mm/mremap.c         | 1 -
 mm/oom_kill.c       | 1 +
 mm/page_io.c        | 1 +
 mm/quicklist.c      | 1 +
 mm/readahead.c      | 1 +
 mm/sparse-vmemmap.c | 1 +
 mm/sparse.c         | 1 +
 mm/swap.c           | 1 +
 mm/swap_state.c     | 1 +
 mm/truncate.c       | 1 +
 mm/vmscan.c         | 2 +-
 mm/vmstat.c         | 1 +
 27 files changed, 21 insertions(+), 10 deletions(-)

(limited to 'mm')

diff --git a/mm/bootmem.c b/mm/bootmem.c
index 9b134460b016..eff224220571 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -10,6 +10,7 @@
  */
 #include <linux/init.h>
 #include <linux/pfn.h>
+#include <linux/slab.h>
 #include <linux/bootmem.h>
 #include <linux/module.h>
 #include <linux/kmemleak.h>
diff --git a/mm/bounce.c b/mm/bounce.c
index a2b76a588e34..13b6dad1eed2 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -6,6 +6,7 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/swap.h>
+#include <linux/gfp.h>
 #include <linux/bio.h>
 #include <linux/pagemap.h>
 #include <linux/mempool.h>
diff --git a/mm/failslab.c b/mm/failslab.c
index bb41f98dd8b7..c5f88f240ddc 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -1,5 +1,4 @@
 #include <linux/fault-inject.h>
-#include <linux/gfp.h>
 #include <linux/slab.h>
 
 static struct {
diff --git a/mm/filemap.c b/mm/filemap.c
index 045b31c37653..140ebda9640f 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -10,13 +10,13 @@
  * the NFS filesystem used to do this differently, for example)
  */
 #include <linux/module.h>
-#include <linux/slab.h>
 #include <linux/compiler.h>
 #include <linux/fs.h>
 #include <linux/uaccess.h>
 #include <linux/aio.h>
 #include <linux/capability.h>
 #include <linux/kernel_stat.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/mman.h>
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 78b94f0b6d5d..83364df74a33 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -17,6 +17,7 @@
 #include <linux/sched.h>
 #include <linux/seqlock.h>
 #include <linux/mutex.h>
+#include <linux/gfp.h>
 #include <asm/tlbflush.h>
 #include <asm/io.h>
 
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 3a5aeb37c110..6034dc9e9796 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2,7 +2,6 @@
  * Generic hugetlb support.
  * (C) William Irwin, April 2004
  */
-#include <linux/gfp.h>
 #include <linux/list.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -18,6 +17,7 @@
 #include <linux/mutex.h>
 #include <linux/bootmem.h>
 #include <linux/sysfs.h>
+#include <linux/slab.h>
 
 #include <asm/page.h>
 #include <asm/pgtable.h>
diff --git a/mm/kmemcheck.c b/mm/kmemcheck.c
index fd814fd61319..8f8e48acf7d9 100644
--- a/mm/kmemcheck.c
+++ b/mm/kmemcheck.c
@@ -1,7 +1,6 @@
 #include <linux/gfp.h>
 #include <linux/mm_types.h>
 #include <linux/mm.h>
-#include <linux/slab.h>
 #include <linux/kmemcheck.h>
 
 void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node)
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 5b069e4f5e48..2c0d032ac898 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -72,7 +72,6 @@
 #include <linux/module.h>
 #include <linux/kthread.h>
 #include <linux/prio_tree.h>
-#include <linux/gfp.h>
 #include <linux/fs.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index d1f335162976..620b0b461593 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -44,6 +44,7 @@
 #include <linux/migrate.h>
 #include <linux/page-isolation.h>
 #include <linux/suspend.h>
+#include <linux/slab.h>
 #include "internal.h"
 
 int sysctl_memory_failure_early_kill __read_mostly = 0;
diff --git a/mm/memory.c b/mm/memory.c
index bc9ba5a1f5b9..1d2ea39260e5 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -56,6 +56,7 @@
 #include <linux/kallsyms.h>
 #include <linux/swapops.h>
 #include <linux/elf.h>
+#include <linux/gfp.h>
 
 #include <asm/io.h>
 #include <asm/pgalloc.h>
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 8034abd3a135..08f40a2f3fe0 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -73,7 +73,6 @@
 #include <linux/sched.h>
 #include <linux/nodemask.h>
 #include <linux/cpuset.h>
-#include <linux/gfp.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/module.h>
diff --git a/mm/migrate.c b/mm/migrate.c
index 88000b89fc9a..d3f3f7f81075 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -32,6 +32,7 @@
 #include <linux/security.h>
 #include <linux/memcontrol.h>
 #include <linux/syscalls.h>
+#include <linux/gfp.h>
 
 #include "internal.h"
 
diff --git a/mm/mincore.c b/mm/mincore.c
index 7a3436ef39eb..f77433c20279 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -7,8 +7,8 @@
 /*
  * The mincore() system call.
  */
-#include <linux/slab.h>
 #include <linux/pagemap.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/mman.h>
 #include <linux/syscalls.h>
diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 7e33f2cb3c77..438951d366f2 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -16,6 +16,7 @@
 #include <linux/err.h>
 #include <linux/rcupdate.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 
 /*
  * This function can't run concurrently against mmu_notifier_register
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 8bc969d8112d..2d1bf7cf8851 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -10,7 +10,6 @@
 
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
-#include <linux/slab.h>
 #include <linux/shm.h>
 #include <linux/mman.h>
 #include <linux/fs.h>
diff --git a/mm/mremap.c b/mm/mremap.c
index e9c75efce609..cde56ee51ef7 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -9,7 +9,6 @@
 
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
-#include <linux/slab.h>
 #include <linux/shm.h>
 #include <linux/ksm.h>
 #include <linux/mman.h>
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 9b223af6a147..b68e802a7a7d 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -18,6 +18,7 @@
 #include <linux/oom.h>
 #include <linux/mm.h>
 #include <linux/err.h>
+#include <linux/gfp.h>
 #include <linux/sched.h>
 #include <linux/swap.h>
 #include <linux/timex.h>
diff --git a/mm/page_io.c b/mm/page_io.c
index a19af956ee1b..31a3b962230a 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -12,6 +12,7 @@
 
 #include <linux/mm.h>
 #include <linux/kernel_stat.h>
+#include <linux/gfp.h>
 #include <linux/pagemap.h>
 #include <linux/swap.h>
 #include <linux/bio.h>
diff --git a/mm/quicklist.c b/mm/quicklist.c
index 6633965bb27b..2876349339a7 100644
--- a/mm/quicklist.c
+++ b/mm/quicklist.c
@@ -14,6 +14,7 @@
  */
 #include <linux/kernel.h>
 
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/mmzone.h>
 #include <linux/module.h>
diff --git a/mm/readahead.c b/mm/readahead.c
index 337b20e946f6..999b54bb462f 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -9,6 +9,7 @@
 
 #include <linux/kernel.h>
 #include <linux/fs.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/blkdev.h>
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index 392b9bb5bc01..aa33fd67fa41 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -22,6 +22,7 @@
 #include <linux/bootmem.h>
 #include <linux/highmem.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/vmalloc.h>
 #include <linux/sched.h>
diff --git a/mm/sparse.c b/mm/sparse.c
index 22896d589133..dc0cc4d43ff3 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -2,6 +2,7 @@
  * sparse memory mappings.
  */
 #include <linux/mm.h>
+#include <linux/slab.h>
 #include <linux/mmzone.h>
 #include <linux/bootmem.h>
 #include <linux/highmem.h>
diff --git a/mm/swap.c b/mm/swap.c
index 9036b89813ac..7cd60bf0a972 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -30,6 +30,7 @@
 #include <linux/notifier.h>
 #include <linux/backing-dev.h>
 #include <linux/memcontrol.h>
+#include <linux/gfp.h>
 
 #include "internal.h"
 
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 6d1daeb1cb4a..e10f5833167f 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -8,6 +8,7 @@
  */
 #include <linux/module.h>
 #include <linux/mm.h>
+#include <linux/gfp.h>
 #include <linux/kernel_stat.h>
 #include <linux/swap.h>
 #include <linux/swapops.h>
diff --git a/mm/truncate.c b/mm/truncate.c
index e87e37244829..f42675a3615d 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -9,6 +9,7 @@
 
 #include <linux/kernel.h>
 #include <linux/backing-dev.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/module.h>
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 79c809895fba..e0e5f15bb726 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -13,7 +13,7 @@
 
 #include <linux/mm.h>
 #include <linux/module.h>
-#include <linux/slab.h>
+#include <linux/gfp.h>
 #include <linux/kernel_stat.h>
 #include <linux/swap.h>
 #include <linux/pagemap.h>
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 7f760cbc73f3..fa12ea3051fb 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -12,6 +12,7 @@
 #include <linux/mm.h>
 #include <linux/err.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/cpu.h>
 #include <linux/vmstat.h>
 #include <linux/sched.h>
-- 
cgit v1.2.3-59-g8ed1b


From ea5a9f0c3447889abceb7482c391bb977472eab9 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <randy.dunlap@oracle.com>
Date: Tue, 30 Mar 2010 03:01:14 +0900
Subject: kmemcheck: Fix build errors due to missing slab.h

mm/kmemcheck.c:69: error: dereferencing pointer to incomplete type
mm/kmemcheck.c:69: error: 'SLAB_NOTRACK' undeclared (first use in this function)
mm/kmemcheck.c:82: error: dereferencing pointer to incomplete type
mm/kmemcheck.c:94: error: dereferencing pointer to incomplete type
mm/kmemcheck.c:94: error: dereferencing pointer to incomplete type
mm/kmemcheck.c:94: error: 'SLAB_DESTROY_BY_RCU' undeclared (first use in this function)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
---
 mm/kmemcheck.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'mm')

diff --git a/mm/kmemcheck.c b/mm/kmemcheck.c
index 8f8e48acf7d9..fd814fd61319 100644
--- a/mm/kmemcheck.c
+++ b/mm/kmemcheck.c
@@ -1,6 +1,7 @@
 #include <linux/gfp.h>
 #include <linux/mm_types.h>
 #include <linux/mm.h>
+#include <linux/slab.h>
 #include <linux/kmemcheck.h>
 
 void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node)
-- 
cgit v1.2.3-59-g8ed1b


From de380b55f92986c1a84198149cb71b7228d15fbd Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Wed, 24 Mar 2010 17:06:43 +0900
Subject: percpu: don't implicitly include slab.h from percpu.h

percpu.h has always been including slab.h to get k[mz]alloc/free() for
UP inline implementation.  percpu.h being used by very low level
headers including module.h and sched.h, this meant that a lot files
unintentionally got slab.h inclusion.

Lee Schermerhorn was trying to make topology.h use percpu.h and got
bitten by this implicit inclusion.  The right thing to do is break
this ultimately unnecessary dependency.  The previous patch added
explicit inclusion of either gfp.h or slab.h to the source files using
them.  This patch updates percpu.h such that slab.h is no longer
included from percpu.h.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
---
 include/linux/percpu.h | 30 +++++-------------------------
 mm/Makefile            |  6 +++++-
 mm/percpu_up.c         | 30 ++++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+), 26 deletions(-)
 create mode 100644 mm/percpu_up.c

(limited to 'mm')

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index a93e5bfdccb8..c7845130bfdf 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -2,10 +2,10 @@
 #define __LINUX_PERCPU_H
 
 #include <linux/preempt.h>
-#include <linux/slab.h> /* For kmalloc() */
 #include <linux/smp.h>
 #include <linux/cpumask.h>
 #include <linux/pfn.h>
+#include <linux/init.h>
 
 #include <asm/percpu.h>
 
@@ -135,9 +135,6 @@ extern int __init pcpu_page_first_chunk(size_t reserved_size,
 #define per_cpu_ptr(ptr, cpu)	SHIFT_PERCPU_PTR((ptr), per_cpu_offset((cpu)))
 
 extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align);
-extern void __percpu *__alloc_percpu(size_t size, size_t align);
-extern void free_percpu(void __percpu *__pdata);
-extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
 
 #ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
 extern void __init setup_per_cpu_areas(void);
@@ -147,27 +144,6 @@ extern void __init setup_per_cpu_areas(void);
 
 #define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); })
 
-static inline void __percpu *__alloc_percpu(size_t size, size_t align)
-{
-	/*
-	 * Can't easily make larger alignment work with kmalloc.  WARN
-	 * on it.  Larger alignment should only be used for module
-	 * percpu sections on SMP for which this path isn't used.
-	 */
-	WARN_ON_ONCE(align > SMP_CACHE_BYTES);
-	return kzalloc(size, GFP_KERNEL);
-}
-
-static inline void free_percpu(void __percpu *p)
-{
-	kfree(p);
-}
-
-static inline phys_addr_t per_cpu_ptr_to_phys(void *addr)
-{
-	return __pa(addr);
-}
-
 static inline void __init setup_per_cpu_areas(void) { }
 
 static inline void *pcpu_lpage_remapped(void *kaddr)
@@ -177,6 +153,10 @@ static inline void *pcpu_lpage_remapped(void *kaddr)
 
 #endif /* CONFIG_SMP */
 
+extern void __percpu *__alloc_percpu(size_t size, size_t align);
+extern void free_percpu(void __percpu *__pdata);
+extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
+
 #define alloc_percpu(type)	\
 	(typeof(type) __percpu *)__alloc_percpu(sizeof(type), __alignof__(type))
 
diff --git a/mm/Makefile b/mm/Makefile
index 7a68d2ab5560..6c2a73a54a43 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -33,7 +33,11 @@ obj-$(CONFIG_FAILSLAB) += failslab.o
 obj-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o
 obj-$(CONFIG_FS_XIP) += filemap_xip.o
 obj-$(CONFIG_MIGRATION) += migrate.o
-obj-$(CONFIG_SMP) += percpu.o
+ifdef CONFIG_SMP
+obj-y += percpu.o
+else
+obj-y += percpu_up.o
+endif
 obj-$(CONFIG_QUICKLIST) += quicklist.o
 obj-$(CONFIG_CGROUP_MEM_RES_CTLR) += memcontrol.o page_cgroup.o
 obj-$(CONFIG_MEMORY_FAILURE) += memory-failure.o
diff --git a/mm/percpu_up.c b/mm/percpu_up.c
new file mode 100644
index 000000000000..c4351c7f57d2
--- /dev/null
+++ b/mm/percpu_up.c
@@ -0,0 +1,30 @@
+/*
+ * mm/percpu_up.c - dummy percpu memory allocator implementation for UP
+ */
+
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <linux/slab.h>
+
+void __percpu *__alloc_percpu(size_t size, size_t align)
+{
+	/*
+	 * Can't easily make larger alignment work with kmalloc.  WARN
+	 * on it.  Larger alignment should only be used for module
+	 * percpu sections on SMP for which this path isn't used.
+	 */
+	WARN_ON_ONCE(align > SMP_CACHE_BYTES);
+	return kzalloc(size, GFP_KERNEL);
+}
+EXPORT_SYMBOL_GPL(__alloc_percpu);
+
+void free_percpu(void __percpu *p)
+{
+	kfree(p);
+}
+EXPORT_SYMBOL_GPL(free_percpu);
+
+phys_addr_t per_cpu_ptr_to_phys(void *addr)
+{
+	return __pa(addr);
+}
-- 
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