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 4ce8d1358feec..c04dd576f3331 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 0799fea4c5886..20b3593761282 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 ae5189ab00492..f73daa6f39700 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 14726eef1ce0c..f0907995b4c90 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 99f0ad753f32c..99ddd148a760f 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 088d09fb1615a..566e803cc6026 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 316708d5af92d..1c66d30971ade 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 20e3f8702d1e5..bcb394dfbb358 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 38657cdaf54d3..c4acac74725c4 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 f8538bbd0bfae..ae16c8cb4f3e9 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 ee648fe5d96fc..01560bb67a7af 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 cf79cf759e136..2c60435f2beb4 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 c93ef207b0b44..c0f0ac7c1cdb8 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 48a760220baf9..bf6e11c758d5e 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 5408186afc35c..ade40066decf5 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 cb5cd422f3f51..82fd249353322 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 444b60aa15e95..365c02fc25fcf 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 78a39a41547d0..57607696735cf 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 f97570a847ca0..9c37dad3e8168 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 18b7099a8125c..fafccc2fd3314 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 68041d9dc2602..695066b5b2e6d 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 ba41da59e31b1..96fcfa522dab7 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 22a0ef41bad1b..18b2a1f10ed89 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 1adc8d455f0ea..df0de27c27334 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 aaab875e1a351..6028fb862254b 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 421abfd3641d2..7bbac7d0f5abc 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 e486f7c3ffb8b..f07d2f03181a9 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 3f8bce264df66..d49df7840541f 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 603ae98d9694d..799dcfd7cd8c5 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 46a9c163a92f2..bcfa4987c8ae2 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 8bfd45050a614..c9177202c8ce2 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 91104d35de7d9..0a3920bf36137 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 aeeece72b72fa..6ed9e27d8202c 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 7ebeed0a877cf..960ea899c864e 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 356c7e467b83f..99358d61e9a58 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
-- 
2.30.2