From 268bb0ce3e87872cb9290c322b0d35bce230d88f Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 20 May 2011 12:50:29 -0700
Subject: [PATCH] sanitize <linux/prefetch.h> usage

Commit e66eed651fd1 ("list: remove prefetching from regular list
iterators") removed the include of prefetch.h from list.h, which
uncovered several cases that had apparently relied on that rather
obscure header file dependency.

So this fixes things up a bit, using

   grep -L linux/prefetch.h $(git grep -l '[^a-z_]prefetchw*(' -- '*.[ch]')
   grep -L 'prefetchw*(' $(git grep -l 'linux/prefetch.h' -- '*.[ch]')

to guide us in finding files that either need <linux/prefetch.h>
inclusion, or have it despite not needing it.

There are more of them around (mostly network drivers), but this gets
many core ones.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/ia64/hp/common/sba_iommu.c      | 1 +
 arch/ia64/mm/fault.c                 | 1 +
 arch/powerpc/lib/sstep.c             | 1 +
 arch/sh/kernel/cpu/sh4/sq.c          | 1 +
 arch/x86/include/asm/uaccess.h       | 1 -
 arch/x86/include/asm/uaccess_32.h    | 1 -
 arch/x86/include/asm/uaccess_64.h    | 1 -
 arch/x86/mm/fault.c                  | 1 +
 drivers/misc/sgi-gru/grufault.c      | 1 +
 drivers/misc/sgi-gru/grumain.c       | 1 +
 drivers/net/acenic.c                 | 1 +
 drivers/net/ehea/ehea_main.c         | 1 +
 drivers/staging/pohmelfs/inode.c     | 1 +
 drivers/usb/gadget/goku_udc.c        | 1 +
 drivers/usb/gadget/imx_udc.c         | 1 +
 drivers/usb/gadget/omap_udc.c        | 1 +
 drivers/usb/gadget/pxa25x_udc.c      | 1 +
 drivers/usb/gadget/pxa27x_udc.c      | 1 +
 drivers/usb/host/isp1362-hcd.c       | 1 +
 drivers/usb/host/sl811-hcd.c         | 1 +
 drivers/video/udlfb.c                | 1 +
 fs/btrfs/extent_io.c                 | 1 +
 fs/dcache.c                          | 1 +
 fs/logfs/dev_bdev.c                  | 1 +
 include/asm-generic/xor.h            | 2 +-
 kernel/rcutiny.c                     | 1 +
 kernel/rcutree.c                     | 1 +
 mm/page_alloc.c                      | 1 +
 mm/prio_tree.c                       | 1 +
 mm/slab.c                            | 1 +
 mm/vmscan.c                          | 1 +
 net/core/dst.c                       | 1 +
 net/core/pktgen.c                    | 1 +
 net/core/skbuff.c                    | 1 +
 tools/perf/util/include/linux/list.h | 2 +-
 35 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c
index 4ce8d1358feece..c04dd576f3331e 100644
--- a/arch/ia64/hp/common/sba_iommu.c
+++ b/arch/ia64/hp/common/sba_iommu.c
@@ -37,6 +37,7 @@
 #include <linux/crash_dump.h>
 #include <linux/iommu-helper.h>
 #include <linux/dma-mapping.h>
+#include <linux/prefetch.h>
 
 #include <asm/delay.h>		/* ia64_get_itc() */
 #include <asm/io.h>
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 0799fea4c58866..20b35937612827 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -10,6 +10,7 @@
 #include <linux/interrupt.h>
 #include <linux/kprobes.h>
 #include <linux/kdebug.h>
+#include <linux/prefetch.h>
 
 #include <asm/pgtable.h>
 #include <asm/processor.h>
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index ae5189ab004926..f73daa6f397007 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/kprobes.h>
 #include <linux/ptrace.h>
+#include <linux/prefetch.h>
 #include <asm/sstep.h>
 #include <asm/processor.h>
 #include <asm/uaccess.h>
diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
index 14726eef1ce0cf..f0907995b4c90a 100644
--- a/arch/sh/kernel/cpu/sh4/sq.c
+++ b/arch/sh/kernel/cpu/sh4/sq.c
@@ -20,6 +20,7 @@
 #include <linux/vmalloc.h>
 #include <linux/mm.h>
 #include <linux/io.h>
+#include <linux/prefetch.h>
 #include <asm/page.h>
 #include <asm/cacheflush.h>
 #include <cpu/sq.h>
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 99f0ad753f32c4..99ddd148a760ff 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -6,7 +6,6 @@
 #include <linux/errno.h>
 #include <linux/compiler.h>
 #include <linux/thread_info.h>
-#include <linux/prefetch.h>
 #include <linux/string.h>
 #include <asm/asm.h>
 #include <asm/page.h>
diff --git a/arch/x86/include/asm/uaccess_32.h b/arch/x86/include/asm/uaccess_32.h
index 088d09fb1615af..566e803cc6026a 100644
--- a/arch/x86/include/asm/uaccess_32.h
+++ b/arch/x86/include/asm/uaccess_32.h
@@ -6,7 +6,6 @@
  */
 #include <linux/errno.h>
 #include <linux/thread_info.h>
-#include <linux/prefetch.h>
 #include <linux/string.h>
 #include <asm/asm.h>
 #include <asm/page.h>
diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 316708d5af92d2..1c66d30971aded 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -6,7 +6,6 @@
  */
 #include <linux/compiler.h>
 #include <linux/errno.h>
-#include <linux/prefetch.h>
 #include <linux/lockdep.h>
 #include <asm/alternative.h>
 #include <asm/cpufeature.h>
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 20e3f8702d1e57..bcb394dfbb3587 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -12,6 +12,7 @@
 #include <linux/mmiotrace.h>		/* kmmio_handler, ...		*/
 #include <linux/perf_event.h>		/* perf_sw_event		*/
 #include <linux/hugetlb.h>		/* hstate_index_to_shift	*/
+#include <linux/prefetch.h>		/* prefetchw			*/
 
 #include <asm/traps.h>			/* dotraplinkage, ...		*/
 #include <asm/pgalloc.h>		/* pgd_*(), ...			*/
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index 38657cdaf54d32..c4acac74725c4d 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -33,6 +33,7 @@
 #include <linux/io.h>
 #include <linux/uaccess.h>
 #include <linux/security.h>
+#include <linux/prefetch.h>
 #include <asm/pgtable.h>
 #include "gru.h"
 #include "grutables.h"
diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index f8538bbd0bfae7..ae16c8cb4f3e94 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -28,6 +28,7 @@
 #include <linux/device.h>
 #include <linux/list.h>
 #include <linux/err.h>
+#include <linux/prefetch.h>
 #include <asm/uv/uv_hub.h>
 #include "gru.h"
 #include "grutables.h"
diff --git a/drivers/net/acenic.c b/drivers/net/acenic.c
index ee648fe5d96fc4..01560bb67a7afa 100644
--- a/drivers/net/acenic.c
+++ b/drivers/net/acenic.c
@@ -68,6 +68,7 @@
 #include <linux/sockios.h>
 #include <linux/firmware.h>
 #include <linux/slab.h>
+#include <linux/prefetch.h>
 
 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
 #include <linux/if_vlan.h>
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index cf79cf759e1360..2c60435f2beb4a 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -41,6 +41,7 @@
 #include <linux/memory.h>
 #include <asm/kexec.h>
 #include <linux/mutex.h>
+#include <linux/prefetch.h>
 
 #include <net/ip.h>
 
diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c
index c93ef207b0b442..c0f0ac7c1cdb8f 100644
--- a/drivers/staging/pohmelfs/inode.c
+++ b/drivers/staging/pohmelfs/inode.c
@@ -29,6 +29,7 @@
 #include <linux/slab.h>
 #include <linux/statfs.h>
 #include <linux/writeback.h>
+#include <linux/prefetch.h>
 
 #include "netfs.h"
 
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index 48a760220baf99..bf6e11c758d5ec 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -38,6 +38,7 @@
 #include <linux/device.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
+#include <linux/prefetch.h>
 
 #include <asm/byteorder.h>
 #include <asm/io.h>
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index 5408186afc35c4..ade40066decf59 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -30,6 +30,7 @@
 #include <linux/delay.h>
 #include <linux/timer.h>
 #include <linux/slab.h>
+#include <linux/prefetch.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index cb5cd422f3f513..82fd2493533228 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -44,6 +44,7 @@
 #include <linux/usb/otg.h>
 #include <linux/dma-mapping.h>
 #include <linux/clk.h>
+#include <linux/prefetch.h>
 
 #include <asm/byteorder.h>
 #include <asm/io.h>
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index 444b60aa15e951..365c02fc25fcf0 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -46,6 +46,7 @@
 #include <linux/seq_file.h>
 #include <linux/debugfs.h>
 #include <linux/io.h>
+#include <linux/prefetch.h>
 
 #include <asm/byteorder.h>
 #include <asm/dma.h>
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 78a39a41547d0f..57607696735cfb 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -32,6 +32,7 @@
 #include <linux/irq.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
+#include <linux/prefetch.h>
 
 #include <asm/byteorder.h>
 #include <mach/hardware.h>
diff --git a/drivers/usb/host/isp1362-hcd.c b/drivers/usb/host/isp1362-hcd.c
index f97570a847ca07..9c37dad3e81689 100644
--- a/drivers/usb/host/isp1362-hcd.c
+++ b/drivers/usb/host/isp1362-hcd.c
@@ -81,6 +81,7 @@
 #include <linux/pm.h>
 #include <linux/io.h>
 #include <linux/bitmap.h>
+#include <linux/prefetch.h>
 
 #include <asm/irq.h>
 #include <asm/system.h>
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index 18b7099a8125c9..fafccc2fd33140 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -47,6 +47,7 @@
 #include <linux/usb/sl811.h>
 #include <linux/usb/hcd.h>
 #include <linux/platform_device.h>
+#include <linux/prefetch.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c
index 68041d9dc2602e..695066b5b2e6d6 100644
--- a/drivers/video/udlfb.c
+++ b/drivers/video/udlfb.c
@@ -27,6 +27,7 @@
 #include <linux/fb.h>
 #include <linux/vmalloc.h>
 #include <linux/slab.h>
+#include <linux/prefetch.h>
 #include <linux/delay.h>
 #include <video/udlfb.h>
 #include "edid.h"
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index ba41da59e31b1d..96fcfa522dab72 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -10,6 +10,7 @@
 #include <linux/swap.h>
 #include <linux/writeback.h>
 #include <linux/pagevec.h>
+#include <linux/prefetch.h>
 #include "extent_io.h"
 #include "extent_map.h"
 #include "compat.h"
diff --git a/fs/dcache.c b/fs/dcache.c
index 22a0ef41bad1b1..18b2a1f10ed89c 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -35,6 +35,7 @@
 #include <linux/hardirq.h>
 #include <linux/bit_spinlock.h>
 #include <linux/rculist_bl.h>
+#include <linux/prefetch.h>
 #include "internal.h"
 
 /*
diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c
index 1adc8d455f0ea2..df0de27c273349 100644
--- a/fs/logfs/dev_bdev.c
+++ b/fs/logfs/dev_bdev.c
@@ -10,6 +10,7 @@
 #include <linux/blkdev.h>
 #include <linux/buffer_head.h>
 #include <linux/gfp.h>
+#include <linux/prefetch.h>
 
 #define PAGE_OFS(ofs) ((ofs) & (PAGE_SIZE-1))
 
diff --git a/include/asm-generic/xor.h b/include/asm-generic/xor.h
index aaab875e1a351f..6028fb862254b8 100644
--- a/include/asm-generic/xor.h
+++ b/include/asm-generic/xor.h
@@ -13,7 +13,7 @@
  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include <asm/processor.h>
+#include <linux/prefetch.h>
 
 static void
 xor_8regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
index 421abfd3641d2f..7bbac7d0f5abc1 100644
--- a/kernel/rcutiny.c
+++ b/kernel/rcutiny.c
@@ -35,6 +35,7 @@
 #include <linux/init.h>
 #include <linux/time.h>
 #include <linux/cpu.h>
+#include <linux/prefetch.h>
 
 /* Controls for rcu_kthread() kthread, replacing RCU_SOFTIRQ used previously. */
 static struct task_struct *rcu_kthread_task;
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index e486f7c3ffb8b2..f07d2f03181a9b 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -49,6 +49,7 @@
 #include <linux/kernel_stat.h>
 #include <linux/wait.h>
 #include <linux/kthread.h>
+#include <linux/prefetch.h>
 
 #include "rcutree.h"
 
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3f8bce264df66f..d49df7840541f5 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -54,6 +54,7 @@
 #include <trace/events/kmem.h>
 #include <linux/ftrace_event.h>
 #include <linux/memcontrol.h>
+#include <linux/prefetch.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
diff --git a/mm/prio_tree.c b/mm/prio_tree.c
index 603ae98d9694df..799dcfd7cd8c54 100644
--- a/mm/prio_tree.c
+++ b/mm/prio_tree.c
@@ -13,6 +13,7 @@
 
 #include <linux/mm.h>
 #include <linux/prio_tree.h>
+#include <linux/prefetch.h>
 
 /*
  * See lib/prio_tree.c for details on the general radix priority search tree
diff --git a/mm/slab.c b/mm/slab.c
index 46a9c163a92f22..bcfa4987c8ae2c 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -115,6 +115,7 @@
 #include	<linux/debugobjects.h>
 #include	<linux/kmemcheck.h>
 #include	<linux/memory.h>
+#include	<linux/prefetch.h>
 
 #include	<asm/cacheflush.h>
 #include	<asm/tlbflush.h>
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8bfd45050a6149..c9177202c8ce2c 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -42,6 +42,7 @@
 #include <linux/delayacct.h>
 #include <linux/sysctl.h>
 #include <linux/oom.h>
+#include <linux/prefetch.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
diff --git a/net/core/dst.c b/net/core/dst.c
index 91104d35de7d9d..0a3920bf361372 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -19,6 +19,7 @@
 #include <linux/types.h>
 #include <net/net_namespace.h>
 #include <linux/sched.h>
+#include <linux/prefetch.h>
 
 #include <net/dst.h>
 
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index aeeece72b72fa2..6ed9e27d8202c9 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -156,6 +156,7 @@
 #include <linux/wait.h>
 #include <linux/etherdevice.h>
 #include <linux/kthread.h>
+#include <linux/prefetch.h>
 #include <net/net_namespace.h>
 #include <net/checksum.h>
 #include <net/ipv6.h>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 7ebeed0a877cf4..960ea899c864ec 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -57,6 +57,7 @@
 #include <linux/init.h>
 #include <linux/scatterlist.h>
 #include <linux/errqueue.h>
+#include <linux/prefetch.h>
 
 #include <net/protocol.h>
 #include <net/dst.h>
diff --git a/tools/perf/util/include/linux/list.h b/tools/perf/util/include/linux/list.h
index 356c7e467b83fd..99358d61e9a582 100644
--- a/tools/perf/util/include/linux/list.h
+++ b/tools/perf/util/include/linux/list.h
@@ -23,5 +23,5 @@ static inline void list_del_range(struct list_head *begin,
  * @head: the head for your list.
  */
 #define list_for_each_from(pos, head) \
-	for (; prefetch(pos->next), pos != (head); pos = pos->next)
+	for (; pos != (head); pos = pos->next)
 #endif