---

yaml
---
r: 18702
b: refs/heads/master
c: d669af9
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f87d09be8c2c270b83c2ad80d06206a7306e2fa9
+refs/heads/master: d669af9d5afb5bdb629f78d024b35e507465f570

trunk/Documentation/filesystems/fuse.txt

@@ -86,6 +86,62 @@ Mount options
   The default is infinite.  Note that the size of read requests is
   limited anyway to 32 pages (which is 128kbyte on i386).
 
+Sysfs
+~~~~~
+
+FUSE sets up the following hierarchy in sysfs:
+
+  /sys/fs/fuse/connections/N/
+
+where N is an increasing number allocated to each new connection.
+
+For each connection the following attributes are defined:
+
+ 'waiting'
+
+  The number of requests which are waiting to be transfered to
+  userspace or being processed by the filesystem daemon.  If there is
+  no filesystem activity and 'waiting' is non-zero, then the
+  filesystem is hung or deadlocked.
+
+ 'abort'
+
+  Writing anything into this file will abort the filesystem
+  connection.  This means that all waiting requests will be aborted an
+  error returned for all aborted and new requests.
+
+Only a privileged user may read or write these attributes.
+
+Aborting a filesystem connection
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+It is possible to get into certain situations where the filesystem is
+not responding.  Reasons for this may be:
+
+  a) Broken userspace filesystem implementation
+
+  b) Network connection down
+
+  c) Accidental deadlock
+
+  d) Malicious deadlock
+
+(For more on c) and d) see later sections)
+
+In either of these cases it may be useful to abort the connection to
+the filesystem.  There are several ways to do this:
+
+  - Kill the filesystem daemon.  Works in case of a) and b)
+
+  - Kill the filesystem daemon and all users of the filesystem.  Works
+    in all cases except some malicious deadlocks
+
+  - Use forced umount (umount -f).  Works in all cases but only if
+    filesystem is still attached (it hasn't been lazy unmounted)
+
+  - Abort filesystem through the sysfs interface.  Most powerful
+    method, always works.
+
 How do non-privileged mounts work?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -313,3 +369,10 @@ faulted with get_user_pages().  The 'req->locked' flag indicates
 when the copy is taking place, and interruption is delayed until
 this flag is unset.
 
+Scenario 3 - Tricky deadlock with asynchronous read
+---------------------------------------------------
+
+The same situation as above, except thread-1 will wait on page lock
+and hence it will be uninterruptible as well.  The solution is to
+abort the connection with forced umount (if mount is attached) or
+through the abort attribute in sysfs.

trunk/Makefile

@@ -106,12 +106,13 @@ KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 $(if $(KBUILD_OUTPUT),, \
      $(error output directory "$(saved-output)" does not exist))
 
-.PHONY: $(MAKECMDGOALS)
+.PHONY: $(MAKECMDGOALS) cdbuilddir
+$(MAKECMDGOALS) _all: cdbuilddir
 
-$(filter-out _all,$(MAKECMDGOALS)) _all:
+cdbuilddir:
 	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 	KBUILD_SRC=$(CURDIR) \
-	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
+	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $(MAKECMDGOALS)
 
 # Leave processing to above invocation of make
 skip-makefile := 1
@@ -262,6 +263,13 @@ export quiet Q KBUILD_VERBOSE
 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
 # See documentation in Documentation/kbuild/makefiles.txt
 
+# as-option
+# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
+
+as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
+	     -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
+	     else echo "$(2)"; fi ;)
+
 # cc-option
 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
 
@@ -337,8 +345,9 @@ AFLAGS		:= -D__ASSEMBLY__
 
 # Read KERNELRELEASE from .kernelrelease (if it exists)
 KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
+KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 
-export	VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE \
+export	VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
 	ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 	CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
 	HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
@@ -433,6 +442,7 @@ export KBUILD_DEFCONFIG
 config %config: scripts_basic outputmakefile FORCE
 	$(Q)mkdir -p include/linux
 	$(Q)$(MAKE) $(build)=scripts/kconfig $@
+	$(Q)$(MAKE) .kernelrelease
 
 else
 # ===========================================================================
@@ -542,7 +552,7 @@ export	INSTALL_PATH ?= /boot
 # makefile but the arguement can be passed to make if needed.
 #
 
-MODLIB	:= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
+MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 export MODLIB
 
 
@@ -783,12 +793,10 @@ endif
 localver-full = $(localver)$(localver-auto)
 
 # Store (new) KERNELRELASE string in .kernelrelease
-kernelrelease = \
-       $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(localver-full)
+kernelrelease = $(KERNELVERSION)$(localver-full)
 .kernelrelease: FORCE
-	$(Q)rm -f .kernelrelease
-	$(Q)echo $(kernelrelease) > .kernelrelease
-	$(Q)echo "  Building kernel $(kernelrelease)"
+	$(Q)rm -f $@
+	$(Q)echo $(kernelrelease) > $@
 
 
 # Things we need to do before we recursively start building the kernel
@@ -898,7 +906,7 @@ define filechk_version.h
 	)
 endef
 
-include/linux/version.h: $(srctree)/Makefile FORCE
+include/linux/version.h: $(srctree)/Makefile .config FORCE
 	$(call filechk,version.h)
 
 # ---------------------------------------------------------------------------
@@ -1301,9 +1309,10 @@ checkstack:
 	$(PERL) $(src)/scripts/checkstack.pl $(ARCH)
 
 kernelrelease:
-	@echo $(KERNELRELEASE)
+	$(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
+	$(error kernelrelease not valid - run 'make *config' to update it))
 kernelversion:
-	@echo $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
+	@echo $(KERNELVERSION)
 
 # FIXME Should go into a make.lib or something 
 # ===========================================================================

trunk/arch/arm26/kernel/irq.c

@@ -141,7 +141,7 @@ int show_interrupts(struct seq_file *p, void *v)
 	if (i < NR_IRQS) {
 	    	action = irq_desc[i].action;
 		if (!action)
-			continue;
+			goto out;
 		seq_printf(p, "%3d: %10u ", i, kstat_irqs(i));
 		seq_printf(p, "  %s", action->name);
 		for (action = action->next; action; action = action->next) {
@@ -152,6 +152,7 @@ int show_interrupts(struct seq_file *p, void *v)
 		show_fiq_list(p, v);
 		seq_printf(p, "Err: %10lu\n", irq_err_count);
 	}
+out:
 	return 0;
 }
 

trunk/arch/arm26/kernel/ptrace.c

@@ -527,7 +527,7 @@ static int ptrace_getfpregs(struct task_struct *tsk, void *ufp)
 static int ptrace_setfpregs(struct task_struct *tsk, void *ufp)
 {
 	set_stopped_child_used_math(tsk);
-	return copy_from_user(&task_threas_info(tsk)->fpstate, ufp,
+	return copy_from_user(&task_thread_info(tsk)->fpstate, ufp,
 			      sizeof(struct user_fp)) ? -EFAULT : 0;
 }
 

trunk/arch/i386/Makefile

@@ -37,10 +37,7 @@ CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
 # CPU-specific tuning. Anything which can be shared with UML should go here.
 include $(srctree)/arch/i386/Makefile.cpu
 
-# -mregparm=3 works ok on gcc-3.0 and later
-#
-cflags-$(CONFIG_REGPARM) += $(shell if [ $(call cc-version) -ge 0300 ] ; then \
-                            echo "-mregparm=3"; fi ;)
+cflags-$(CONFIG_REGPARM) += -mregparm=3
 
 # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
 # a lot more stack due to the lack of sharing of stacklots:

trunk/arch/i386/kernel/cpu/cpufreq/powernow-k8.c

@@ -980,7 +980,7 @@ static int powernowk8_verify(struct cpufreq_policy *pol)
 }
 
 /* per CPU init entry point to the driver */
-static int __init powernowk8_cpu_init(struct cpufreq_policy *pol)
+static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
 {
 	struct powernow_k8_data *data;
 	cpumask_t oldmask = CPU_MASK_ALL;
@@ -1141,7 +1141,7 @@ static struct cpufreq_driver cpufreq_amd64_driver = {
 };
 
 /* driver entry point for init */
-static int __init powernowk8_init(void)
+static int __cpuinit powernowk8_init(void)
 {
 	unsigned int i, supported_cpus = 0;
 

trunk/arch/i386/mm/init.c

@@ -268,7 +268,7 @@ static void __init permanent_kmaps_init(pgd_t *pgd_base)
 	pkmap_page_table = pte;	
 }
 
-static void __devinit free_new_highpage(struct page *page)
+static void __meminit free_new_highpage(struct page *page)
 {
 	set_page_count(page, 1);
 	__free_page(page);

trunk/arch/ia64/kernel/perfmon.c

@@ -628,9 +628,11 @@ static int pfm_write_ibr_dbr(int mode, pfm_context_t *ctx, void *arg, int count,
 
 #include "perfmon_itanium.h"
 #include "perfmon_mckinley.h"
+#include "perfmon_montecito.h"
 #include "perfmon_generic.h"
 
 static pmu_config_t *pmu_confs[]={
+	&pmu_conf_mont,
 	&pmu_conf_mck,
 	&pmu_conf_ita,
 	&pmu_conf_gen, /* must be last */