---

yaml
---
r: 25271
b: refs/heads/master
c: 4b4fa25
h: refs/heads/master
i:
  25269: da27e22
  25267: 1cb6fea
  25263: cb24fdc
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f27f0a045b79de5729d064497e21a70871f1d6fe
+refs/heads/master: 4b4fa25ced2d719a06a3a63009bea1cf1fbedd55

trunk/Documentation/DocBook/Makefile

@@ -2,7 +2,7 @@
 # This makefile is used to generate the kernel documentation,
 # primarily based on in-line comments in various source files.
 # See Documentation/kernel-doc-nano-HOWTO.txt for instruction in how
-# to document the SRC - and how to read it.
+# to ducument the SRC - and how to read it.
 # To add a new book the only step required is to add the book to the
 # list of DOCBOOKS.
 

trunk/Documentation/DocBook/kernel-api.tmpl

@@ -322,6 +322,7 @@ X!Earch/i386/kernel/mca.c
   <chapter id="sysfs">
      <title>The Filesystem for Exporting Kernel Objects</title>
 !Efs/sysfs/file.c
+!Efs/sysfs/dir.c
 !Efs/sysfs/symlink.c
 !Efs/sysfs/bin.c
   </chapter>

trunk/Documentation/acpi-hotkey.txt

@@ -30,7 +30,7 @@ specific hotkey(event))
 echo "event_num:event_type:event_argument" > 
 	/proc/acpi/hotkey/action.
 The result of the execution of this aml method is 
-attached to /proc/acpi/hotkey/poll_method, which is dynamically
+attached to /proc/acpi/hotkey/poll_method, which is dnyamically
 created.  Please use command "cat /proc/acpi/hotkey/polling_method" 
 to retrieve it.
 

trunk/Documentation/feature-removal-schedule.txt

@@ -127,6 +127,13 @@ Who:	Christoph Hellwig <hch@lst.de>
 
 ---------------------------
 
+What:	EXPORT_SYMBOL(lookup_hash)
+When:	January 2006
+Why:	Too low-level interface.  Use lookup_one_len or lookup_create instead.
+Who:	Christoph Hellwig <hch@lst.de>
+
+---------------------------
+
 What:	CONFIG_FORCED_INLINING
 When:	June 2006
 Why:	Config option is there to see if gcc is good enough. (in january
@@ -234,15 +241,3 @@ Why:	The USB subsystem has changed a lot over time, and it has been
 Who:	Greg Kroah-Hartman <gregkh@suse.de>
 
 ---------------------------
-
-What:	find_trylock_page
-When:	January 2007
-Why:	The interface no longer has any callers left in the kernel. It
-	is an odd interface (compared with other find_*_page functions), in
-	that it does not take a refcount to the page, only the page lock.
-	It should be replaced with find_get_page or find_lock_page if possible.
-	This feature removal can be reevaluated if users of the interface
-	cannot cleanly use something else.
-Who:	Nick Piggin <npiggin@suse.de>
-
----------------------------

trunk/Documentation/fujitsu/frv/kernel-ABI.txt

@@ -1,19 +1,17 @@
-			=================================
-			INTERNAL KERNEL ABI FOR FR-V ARCH
-			=================================
-
-The internal FRV kernel ABI is not quite the same as the userspace ABI. A
-number of the registers are used for special purposed, and the ABI is not
-consistent between modules vs core, and MMU vs no-MMU.
-
-This partly stems from the fact that FRV CPUs do not have a separate
-supervisor stack pointer, and most of them do not have any scratch
-registers, thus requiring at least one general purpose register to be
-clobbered in such an event. Also, within the kernel core, it is possible to
-simply jump or call directly between functions using a relative offset.
-This cannot be extended to modules for the displacement is likely to be too
-far. Thus in modules the address of a function to call must be calculated
-in a register and then used, requiring two extra instructions.
+				 =================================
+				 INTERNAL KERNEL ABI FOR FR-V ARCH
+				 =================================
+
+The internal FRV kernel ABI is not quite the same as the userspace ABI. A number of the registers
+are used for special purposed, and the ABI is not consistent between modules vs core, and MMU vs
+no-MMU.
+
+This partly stems from the fact that FRV CPUs do not have a separate supervisor stack pointer, and
+most of them do not have any scratch registers, thus requiring at least one general purpose
+register to be clobbered in such an event. Also, within the kernel core, it is possible to simply
+jump or call directly between functions using a relative offset. This cannot be extended to modules
+for the displacement is likely to be too far. Thus in modules the address of a function to call
+must be calculated in a register and then used, requiring two extra instructions.
 
 This document has the following sections:
 
@@ -41,55 +39,50 @@ When a system call is made, the following registers are effective:
 CPU OPERATING MODES
 ===================
 
-The FR-V CPU has three basic operating modes. In order of increasing
-capability:
+The FR-V CPU has three basic operating modes. In order of increasing capability:
 
   (1) User mode.
 
       Basic userspace running mode.
 
   (2) Kernel mode.
 
-      Normal kernel mode. There are many additional control registers
-      available that may be accessed in this mode, in addition to all the
-      stuff available to user mode. This has two submodes:
+      Normal kernel mode. There are many additional control registers available that may be
+      accessed in this mode, in addition to all the stuff available to user mode. This has two
+      submodes:
 
       (a) Exceptions enabled (PSR.T == 1).
 
-	  Exceptions will invoke the appropriate normal kernel mode
-	  handler. On entry to the handler, the PSR.T bit will be cleared.
+      	  Exceptions will invoke the appropriate normal kernel mode handler. On entry to the
+      	  handler, the PSR.T bit will be cleared.
 
       (b) Exceptions disabled (PSR.T == 0).
 
-	  No exceptions or interrupts may happen. Any mandatory exceptions
-	  will cause the CPU to halt unless the CPU is told to jump into
-	  debug mode instead.
+      	  No exceptions or interrupts may happen. Any mandatory exceptions will cause the CPU to
+      	  halt unless the CPU is told to jump into debug mode instead.
 
   (3) Debug mode.
 
-      No exceptions may happen in this mode. Memory protection and
-      management exceptions will be flagged for later consideration, but
-      the exception handler won't be invoked. Debugging traps such as
-      hardware breakpoints and watchpoints will be ignored. This mode is
-      entered only by debugging events obtained from the other two modes.
+      No exceptions may happen in this mode. Memory protection and management exceptions will be
+      flagged for later consideration, but the exception handler won't be invoked. Debugging traps
+      such as hardware breakpoints and watchpoints will be ignored. This mode is entered only by
+      debugging events obtained from the other two modes.
 
-      All kernel mode registers may be accessed, plus a few extra debugging
-      specific registers.
+      All kernel mode registers may be accessed, plus a few extra debugging specific registers.
 
 
 =================================
 INTERNAL KERNEL-MODE REGISTER ABI
 =================================
 
-There are a number of permanent register assignments that are set up by
-entry.S in the exception prologue. Note that there is a complete set of
-exception prologues for each of user->kernel transition and kernel->kernel
-transition. There are also user->debug and kernel->debug mode transition
-prologues.
+There are a number of permanent register assignments that are set up by entry.S in the exception
+prologue. Note that there is a complete set of exception prologues for each of user->kernel
+transition and kernel->kernel transition. There are also user->debug and kernel->debug mode
+transition prologues.
 
 
 	REGISTER	FLAVOUR	USE
-	===============	=======	==============================================
+	===============	=======	====================================================
 	GR1			Supervisor stack pointer
 	GR15			Current thread info pointer
 	GR16			GP-Rel base register for small data
@@ -99,12 +92,10 @@ prologues.
 	GR31		NOMMU	Destroyed by debug mode entry
 	GR31		MMU	Destroyed by TLB miss kernel mode entry
 	CCR.ICC2		Virtual interrupt disablement tracking
-	CCCR.CC3		Cleared by exception prologue 
-				(atomic op emulation)
+	CCCR.CC3		Cleared by exception prologue (atomic op emulation)
 	SCR0		MMU	See mmu-layout.txt.
 	SCR1		MMU	See mmu-layout.txt.
-	SCR2		MMU	Save for EAR0 (destroyed by icache insns 
-					       in debug mode)
+	SCR2		MMU	Save for EAR0 (destroyed by icache insns in debug mode)
 	SCR3		MMU	Save for GR31 during debug exceptions
 	DAMR/IAMR	NOMMU	Fixed memory protection layout.
 	DAMR/IAMR	MMU	See mmu-layout.txt.
@@ -113,21 +104,18 @@ prologues.
 Certain registers are also used or modified across function calls:
 
 	REGISTER	CALL				RETURN
-	===============	===============================	======================
+	===============	===============================	===============================
 	GR0		Fixed Zero			-
 	GR2		Function call frame pointer
 	GR3		Special				Preserved
 	GR3-GR7		-				Clobbered
-	GR8		Function call arg #1		Return value 
-							(or clobbered)
-	GR9		Function call arg #2		Return value MSW 
-							(or clobbered)
+	GR8		Function call arg #1		Return value (or clobbered)
+	GR9		Function call arg #2		Return value MSW (or clobbered)
 	GR10-GR13	Function call arg #3-#6		Clobbered
 	GR14		-				Clobbered
 	GR15-GR16	Special				Preserved
 	GR17-GR27	-				Preserved
-	GR28-GR31	Special				Only accessed 
-							explicitly
+	GR28-GR31	Special				Only accessed explicitly
 	LR		Return address after CALL	Clobbered
 	CCR/CCCR	-				Mostly Clobbered
 
@@ -136,53 +124,46 @@ Certain registers are also used or modified across function calls:
 INTERNAL DEBUG-MODE REGISTER ABI
 ================================
 
-This is the same as the kernel-mode register ABI for functions calls. The
-difference is that in debug-mode there's a different stack and a different
-exception frame. Almost all the global registers from kernel-mode
-(including the stack pointer) may be changed.
+This is the same as the kernel-mode register ABI for functions calls. The difference is that in
+debug-mode there's a different stack and a different exception frame. Almost all the global
+registers from kernel-mode (including the stack pointer) may be changed.
 
 	REGISTER	FLAVOUR	USE
-	===============	=======	==============================================
+	===============	=======	====================================================
 	GR1			Debug stack pointer
 	GR16			GP-Rel base register for small data
-	GR31			Current debug exception frame pointer 
-				(__debug_frame)
+	GR31			Current debug exception frame pointer (__debug_frame)
 	SCR3		MMU	Saved value of GR31
 
 
-Note that debug mode is able to interfere with the kernel's emulated atomic
-ops, so it must be exceedingly careful not to do any that would interact
-with the main kernel in this regard. Hence the debug mode code (gdbstub) is
-almost completely self-contained. The only external code used is the
-sprintf family of functions.
+Note that debug mode is able to interfere with the kernel's emulated atomic ops, so it must be
+exceedingly careful not to do any that would interact with the main kernel in this regard. Hence
+the debug mode code (gdbstub) is almost completely self-contained. The only external code used is
+the sprintf family of functions.
 
-Futhermore, break.S is so complicated because single-step mode does not
-switch off on entry to an exception. That means unless manually disabled,
-single-stepping will blithely go on stepping into things like interrupts.
-See gdbstub.txt for more information.
+Futhermore, break.S is so complicated because single-step mode does not switch off on entry to an
+exception. That means unless manually disabled, single-stepping will blithely go on stepping into
+things like interrupts. See gdbstub.txt for more information.
 
 
 ==========================
 VIRTUAL INTERRUPT HANDLING
 ==========================
 
-Because accesses to the PSR is so slow, and to disable interrupts we have
-to access it twice (once to read and once to write), we don't actually
-disable interrupts at all if we don't have to. What we do instead is use
-the ICC2 condition code flags to note virtual disablement, such that if we
-then do take an interrupt, we note the flag, really disable interrupts, set
-another flag and resume execution at the point the interrupt happened.
-Setting condition flags as a side effect of an arithmetic or logical
-instruction is really fast. This use of the ICC2 only occurs within the
+Because accesses to the PSR is so slow, and to disable interrupts we have to access it twice (once
+to read and once to write), we don't actually disable interrupts at all if we don't have to. What
+we do instead is use the ICC2 condition code flags to note virtual disablement, such that if we
+then do take an interrupt, we note the flag, really disable interrupts, set another flag and resume
+execution at the point the interrupt happened. Setting condition flags as a side effect of an
+arithmetic or logical instruction is really fast. This use of the ICC2 only occurs within the
 kernel - it does not affect userspace.
 
 The flags we use are:
 
  (*) CCR.ICC2.Z [Zero flag]
 
-     Set to virtually disable interrupts, clear when interrupts are
-     virtually enabled. Can be modified by logical instructions without
-     affecting the Carry flag.
+     Set to virtually disable interrupts, clear when interrupts are virtually enabled. Can be
+     modified by logical instructions without affecting the Carry flag.
 
  (*) CCR.ICC2.C [Carry flag]
 
@@ -195,9 +176,8 @@ What happens is this:
 
 	ICC2.Z is 0, ICC2.C is 1.
 
- (2) An interrupt occurs. The exception prologue examines ICC2.Z and
-     determines that nothing needs doing. This is done simply with an
-     unlikely BEQ instruction.
+ (2) An interrupt occurs. The exception prologue examines ICC2.Z and determines that nothing needs
+     doing. This is done simply with an unlikely BEQ instruction.
 
  (3) The interrupts are disabled (local_irq_disable)
 
@@ -207,56 +187,48 @@ What happens is this:
 
 	ICC2.Z would be set to 0.
 
-     A TIHI #2 instruction (trap #2 if condition HI - Z==0 && C==0) would
-     be used to trap if interrupts were now virtually enabled, but
-     physically disabled - which they're not, so the trap isn't taken. The
-     kernel would then be back to state (1).
+     A TIHI #2 instruction (trap #2 if condition HI - Z==0 && C==0) would be used to trap if
+     interrupts were now virtually enabled, but physically disabled - which they're not, so the
+     trap isn't taken. The kernel would then be back to state (1).
 
- (5) An interrupt occurs. The exception prologue examines ICC2.Z and
-     determines that the interrupt shouldn't actually have happened. It
-     jumps aside, and there disabled interrupts by setting PSR.PIL to 14
-     and then it clears ICC2.C.
+ (5) An interrupt occurs. The exception prologue examines ICC2.Z and determines that the interrupt
+     shouldn't actually have happened. It jumps aside, and there disabled interrupts by setting
+     PSR.PIL to 14 and then it clears ICC2.C.
 
  (6) If interrupts were then saved and disabled again (local_irq_save):
 
-	ICC2.Z would be shifted into the save variable and masked off 
-	(giving a 1).
+	ICC2.Z would be shifted into the save variable and masked off (giving a 1).
 
-	ICC2.Z would then be set to 1 (thus unchanged), and ICC2.C would be
-	unaffected (ie: 0).
+	ICC2.Z would then be set to 1 (thus unchanged), and ICC2.C would be unaffected (ie: 0).
 
  (7) If interrupts were then restored from state (6) (local_irq_restore):
 
-	ICC2.Z would be set to indicate the result of XOR'ing the saved
-	value (ie: 1) with 1, which gives a result of 0 - thus leaving
-	ICC2.Z set.
+	ICC2.Z would be set to indicate the result of XOR'ing the saved value (ie: 1) with 1, which
+	gives a result of 0 - thus leaving ICC2.Z set.
 
 	ICC2.C would remain unaffected (ie: 0).
 
-     A TIHI #2 instruction would be used to again assay the current state,
-     but this would do nothing as Z==1.
+     A TIHI #2 instruction would be used to again assay the current state, but this would do
+     nothing as Z==1.
 
  (8) If interrupts were then enabled (local_irq_enable):
 
-	ICC2.Z would be cleared. ICC2.C would be left unaffected. Both
-	flags would now be 0.
+	ICC2.Z would be cleared. ICC2.C would be left unaffected. Both flags would now be 0.
 
-     A TIHI #2 instruction again issued to assay the current state would
-     then trap as both Z==0 [interrupts virtually enabled] and C==0
-     [interrupts really disabled] would then be true.
+     A TIHI #2 instruction again issued to assay the current state would then trap as both Z==0
+     [interrupts virtually enabled] and C==0 [interrupts really disabled] would then be true.
 
- (9) The trap #2 handler would simply enable hardware interrupts 
-     (set PSR.PIL to 0), set ICC2.C to 1 and return.
+ (9) The trap #2 handler would simply enable hardware interrupts (set PSR.PIL to 0), set ICC2.C to
+     1 and return.
 
 (10) Immediately upon returning, the pending interrupt would be taken.
 
-(11) The interrupt handler would take the path of actually processing the
-     interrupt (ICC2.Z is clear, BEQ fails as per step (2)).
+(11) The interrupt handler would take the path of actually processing the interrupt (ICC2.Z is
+     clear, BEQ fails as per step (2)).
 
-(12) The interrupt handler would then set ICC2.C to 1 since hardware
-     interrupts are definitely enabled - or else the kernel wouldn't be here.
+(12) The interrupt handler would then set ICC2.C to 1 since hardware interrupts are definitely
+     enabled - or else the kernel wouldn't be here.
 
 (13) On return from the interrupt handler, things would be back to state (1).
 
-This trap (#2) is only available in kernel mode. In user mode it will
-result in SIGILL.
+This trap (#2) is only available in kernel mode. In user mode it will result in SIGILL.