doc: fix wrong arch/i386 references

Change all "arch/i386" to "arch/x86" in Documentaion/,
since the directory has changed.

Also update the files which have changed their filename
in the meantime accordingly.

Signed-off-by: Wanlong Gao <[e-mail]>
[[e-mail]: reword changelog]
Signed-off-by: Jiri Kosina <[e-mail]>

Documentation/RCU/NMI-RCU.txt

···
 it is possible to use RCU to provide dynamic non-maskable interrupt
 handlers, as well as dynamic irq handlers.  This document describes
 how to do this, drawing loosely from Zwane Mwaikambo's NMI-timer
-work in "arch/i386/oprofile/nmi_timer_int.c" and in
-"arch/i386/kernel/traps.c".
+work in "arch/x86/oprofile/nmi_timer_int.c" and in
+"arch/x86/kernel/traps.c".
 
 The relevant pieces of code are listed below, each followed by a
 brief explanation.

Documentation/blockdev/README.DAC960

···
   make config
   make bzImage (or zImage)
 
-Then install "arch/i386/boot/bzImage" or "arch/i386/boot/zImage" as your
+Then install "arch/x86/boot/bzImage" or "arch/x86/boot/zImage" as your
 standard kernel, run lilo if appropriate, and reboot.
 
 To create the necessary devices in /dev, the "make_rd" script included in

Documentation/blockdev/ramdisk.txt

···
 is not required. Bits 11 to 13 are not currently used and may as well be zero.
 These numbers are no magical secrets, as seen below:
 
-./arch/i386/kernel/setup.c:#define RAMDISK_IMAGE_START_MASK     0x07FF
-./arch/i386/kernel/setup.c:#define RAMDISK_PROMPT_FLAG          0x8000
-./arch/i386/kernel/setup.c:#define RAMDISK_LOAD_FLAG            0x4000
+./arch/x86/kernel/setup.c:#define RAMDISK_IMAGE_START_MASK     0x07FF
+./arch/x86/kernel/setup.c:#define RAMDISK_PROMPT_FLAG          0x8000
+./arch/x86/kernel/setup.c:#define RAMDISK_LOAD_FLAG            0x4000
 
 Consider a typical two floppy disk setup, where you will have the
 kernel on disk one, and have already put a RAM disk image onto disk #2.
···
 Putting that together gives 2^15 + 2^14 + 0 = 49152 for an rdev word.
 So to create disk one of the set, you would do:
 
-	/usr/src/linux# cat arch/i386/boot/zImage > /dev/fd0
+	/usr/src/linux# cat arch/x86/boot/zImage > /dev/fd0
 	/usr/src/linux# rdev /dev/fd0 /dev/fd0
 	/usr/src/linux# rdev -r /dev/fd0 49152
 

Documentation/cpu-freq/cpu-drivers.txt

···
 to policy->max, and -if supported- select a performance-oriented
 setting when policy->policy is CPUFREQ_POLICY_PERFORMANCE, and a
 powersaving-oriented setting when CPUFREQ_POLICY_POWERSAVE. Also check
-the reference implementation in arch/i386/kernel/cpu/cpufreq/longrun.c
+the reference implementation in drivers/cpufreq/longrun.c
 
 
 

Documentation/filesystems/nfs/nfsroot.txt

···
      	cdrecord.
 
 	e.g.
-	  cdrecord dev=ATAPI:1,0,0 arch/i386/boot/image.iso
+	  cdrecord dev=ATAPI:1,0,0 arch/x86/boot/image.iso
 
      	For more information on isolinux, including how to create bootdisks
      	for prebuilt kernels, see http://syslinux.zytor.com/

Documentation/isdn/README.HiSax

···
      <ISDN subsystem - ISDN support -- HiSax>
      make clean; make zImage; make modules; make modules_install
 2. Install the new kernel
-     cp /usr/src/linux/arch/i386/boot/zImage /etc/kernel/linux.isdn
+     cp /usr/src/linux/arch/x86/boot/zImage /etc/kernel/linux.isdn
      vi /etc/lilo.conf
      <add new kernel in the bootable image section>
      lilo

Documentation/kbuild/makefiles.txt

···
 	specified if first option are not supported.
 
 	Example:
-		#arch/i386/kernel/Makefile
+		#arch/x86/kernel/Makefile
 		vsyscall-flags += $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
 
 	In the above example, vsyscall-flags will be assigned the option
···
 	supported to use an optional second option.
 
 	Example:
-		#arch/i386/Makefile
+		#arch/x86/Makefile
 		cflags-y += $(call cc-option,-march=pentium-mmx,-march=i586)
 
 	In the above example, cflags-y will be assigned the option
···
 	even though the option was accepted by gcc.
 
 	Example:
-		#arch/i386/Makefile
+		#arch/x86/Makefile
 		cflags-y += $(shell \
 		if [ $(call cc-version) -ge 0300 ] ; then \
 			echo "-mregparm=3"; fi ;)
···
 is not sufficient this sometimes needs to be explicit.
 
 	Example:
-		#arch/i386/boot/Makefile
+		#arch/x86/boot/Makefile
 		subdir- := compressed/
 
 The above assignment instructs kbuild to descend down in the
···
 final bootimage there is an optional target named archclean:
 
 	Example:
-		#arch/i386/Makefile
+		#arch/x86/Makefile
 		archclean:
-			$(Q)$(MAKE) $(clean)=arch/i386/boot
+			$(Q)$(MAKE) $(clean)=arch/x86/boot
 
-When "make clean" is executed, make will descend down in arch/i386/boot,
-and clean as usual. The Makefile located in arch/i386/boot/ may use
+When "make clean" is executed, make will descend down in arch/x86/boot,
+and clean as usual. The Makefile located in arch/x86/boot/ may use
 the subdir- trick to descend further down.
 
 Note 1: arch/$(ARCH)/Makefile cannot use "subdir-", because that file is
···
 	LDFLAGS_vmlinux uses the LDFLAGS_$@ support.
 
 	Example:
-		#arch/i386/Makefile
+		#arch/x86/Makefile
 		LDFLAGS_vmlinux := -e stext
 
     OBJCOPYFLAGS	objcopy flags
···
 	Often, the KBUILD_CFLAGS variable depends on the configuration.
 
 	Example:
-		#arch/i386/Makefile
+		#arch/x86/Makefile
 		cflags-$(CONFIG_M386) += -march=i386
 		KBUILD_CFLAGS += $(cflags-y)
 
 	Many arch Makefiles dynamically run the target C compiler to
 	probe supported options:
 
-		#arch/i386/Makefile
+		#arch/x86/Makefile
 
 		...
 		cflags-$(CONFIG_MPENTIUMII)     += $(call cc-option,\
···
 	into the arch/$(ARCH)/boot/Makefile.
 
 	Example:
-		#arch/i386/Makefile
-		boot := arch/i386/boot
+		#arch/x86/Makefile
+		boot := arch/x86/boot
 		bzImage: vmlinux
 			$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
···
 	To support this, $(archhelp) must be defined.
 
 	Example:
-		#arch/i386/Makefile
+		#arch/x86/Makefile
 		define archhelp
 		  echo  '* bzImage      - Image (arch/$(ARCH)/boot/bzImage)'
 		endif
···
 	from vmlinux.
 
 	Example:
-		#arch/i386/Makefile
+		#arch/x86/Makefile
 		all: bzImage
 
 	When "make" is executed without arguments, bzImage will be built.
···
 	2) kbuild knows what files to delete during "make clean"
 
 	Example:
-		#arch/i386/kernel/Makefile
+		#arch/x86/kernel/Makefile
 		extra-y := head.o init_task.o
 
 	In this example, extra-y is used to list object files that
···
 	Compress target. Use maximum compression to compress target.
 
 	Example:
-		#arch/i386/boot/Makefile
+		#arch/x86/boot/Makefile
 		LDFLAGS_bootsect := -Ttext 0x0 -s --oformat binary
 		LDFLAGS_setup    := -Ttext 0x0 -s --oformat binary -e begtext
 
···
 
 	When updating the $(obj)/bzImage target, the line
 
-	BUILD    arch/i386/boot/bzImage
+	BUILD    arch/x86/boot/bzImage
 
 	will be displayed with "make KBUILD_VERBOSE=0".
 
···
 	kbuild knows .lds files and includes a rule *lds.S -> *lds.
 
 	Example:
-		#arch/i386/kernel/Makefile
+		#arch/x86/kernel/Makefile
 		always := vmlinux.lds
 
 		#Makefile

Documentation/magic-number.txt

···
 RISCOM8_MAGIC         0x0907      riscom_port       drivers/char/riscom8.h
 SPECIALIX_MAGIC       0x0907      specialix_port    drivers/char/specialix_io8.h
 HDLC_MAGIC            0x239e      n_hdlc            drivers/char/n_hdlc.c
-APM_BIOS_MAGIC        0x4101      apm_user          arch/i386/kernel/apm.c
+APM_BIOS_MAGIC        0x4101      apm_user          arch/x86/kernel/apm_32.c
 CYCLADES_MAGIC        0x4359      cyclades_port     include/linux/cyclades.h
 DB_MAGIC              0x4442      fc_info           drivers/net/iph5526_novram.c
 DL_MAGIC              0x444d      fc_info           drivers/net/iph5526_novram.c

Documentation/mca.txt

···
 
 The ideal MCA adapter detection is done through the use of the
 Programmable Option Select registers.  Generic functions for doing
-this have been added in include/linux/mca.h and arch/i386/kernel/mca.c.
+this have been added in include/linux/mca.h and arch/x86/kernel/mca_32.c.
 Everything needed to detect adapters and read (and write) configuration
 information is there.  A number of MCA-specific drivers already use
 this.  The typical probe code looks like the following:
···
 In general, an interrupt must be acknowledged not only at the ICU (which
 is done automagically by the kernel), but at the device level.  In
 particular, IRQ 0 must be reset after a timer interrupt (now done in
-arch/i386/kernel/time.c) or the first timer interrupt hangs the system.
+arch/x86/kernel/time.c) or the first timer interrupt hangs the system.
 There were also problems with the 1.3.x floppy drivers, but that seems
 to have been fixed.
 

Documentation/scheduler/sched-arch.txt

···
 	    barrier issued (followed by a test of need_resched with
 	    interrupts disabled, as explained in 3).
 
-arch/i386/kernel/process.c has examples of both polling and
+arch/x86/kernel/process.c has examples of both polling and
 sleeping idle functions.
 
 

Documentation/scsi/BusLogic.txt

···
   make config
   make zImage
 
-Then install "arch/i386/boot/zImage" as your standard kernel, run lilo if
+Then install "arch/x86/boot/zImage" as your standard kernel, run lilo if
 appropriate, and reboot.
 
 

Documentation/serial/computone.txt

···
 	   edit /usr/src/linux/drivers/char/ip2.c  
            (Optional - may be specified on kernel command line now)
 d) Run "make zImage" or whatever target you prefer.
-e) mv /usr/src/linux/arch/i386/boot/zImage to /boot.
+e) mv /usr/src/linux/arch/x86/boot/zImage to /boot.
 f) Add new config for this kernel into /etc/lilo.conf, run "lilo"
 	or copy to a floppy disk and boot from that floppy disk.
 g) Reboot using this kernel

Documentation/zh_CN/magic-number.txt

···
 RISCOM8_MAGIC         0x0907      riscom_port       drivers/char/riscom8.h
 SPECIALIX_MAGIC       0x0907      specialix_port    drivers/char/specialix_io8.h
 HDLC_MAGIC            0x239e      n_hdlc            drivers/char/n_hdlc.c
-APM_BIOS_MAGIC        0x4101      apm_user          arch/i386/kernel/apm.c
+APM_BIOS_MAGIC        0x4101      apm_user          arch/x86/kernel/apm_32.c
 CYCLADES_MAGIC        0x4359      cyclades_port     include/linux/cyclades.h
 DB_MAGIC              0x4442      fc_info           drivers/net/iph5526_novram.c
 DL_MAGIC              0x444d      fc_info           drivers/net/iph5526_novram.c