# Most of this file is copied from tools/lib/traceevent/Makefile BPF_VERSION = 0 BPF_PATCHLEVEL = 0 BPF_EXTRAVERSION = 1 MAKEFLAGS += --no-print-directory ifeq ($(srctree),) srctree := $(patsubst %/,%,$(dir $(CURDIR))) srctree := $(patsubst %/,%,$(dir $(srctree))) srctree := $(patsubst %/,%,$(dir $(srctree))) #$(info Determined 'srctree' to be $(srctree)) endif # Makefiles suck: This macro sets a default value of $(2) for the # variable named by $(1), unless the variable has been set by # environment or command line. This is necessary for CC and AR # because make sets default values, so the simpler ?= approach # won't work as expected. define allow-override $(if $(or $(findstring environment,$(origin $(1))),\ $(findstring command line,$(origin $(1)))),,\ $(eval $(1) = $(2))) endef # Allow setting CC and AR, or setting CROSS_COMPILE as a prefix. $(call allow-override,CC,$(CROSS_COMPILE)gcc) $(call allow-override,AR,$(CROSS_COMPILE)ar) INSTALL = install # Use DESTDIR for installing into a different root directory. # This is useful for building a package. The program will be # installed in this directory as if it was the root directory. # Then the build tool can move it later. DESTDIR ?= DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))' include $(srctree)/tools/scripts/Makefile.arch ifeq ($(LP64), 1) libdir_relative = lib64 else libdir_relative = lib endif prefix ?= /usr/local libdir = $(prefix)/$(libdir_relative) man_dir = $(prefix)/share/man man_dir_SQ = '$(subst ','\'',$(man_dir))' export man_dir man_dir_SQ INSTALL export DESTDIR DESTDIR_SQ include ../../scripts/Makefile.include # copy a bit from Linux kbuild ifeq ("$(origin V)", "command line") VERBOSE = $(V) endif ifndef VERBOSE VERBOSE = 0 endif FEATURE_USER = .libbpf FEATURE_TESTS = libelf libelf-getphdrnum libelf-mmap bpf FEATURE_DISPLAY = libelf bpf INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(ARCH)/include/uapi -I$(srctree)/tools/include/uapi FEATURE_CHECK_CFLAGS-bpf = $(INCLUDES) check_feat := 1 NON_CHECK_FEAT_TARGETS := clean TAGS tags cscope help ifdef MAKECMDGOALS ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) check_feat := 0 endif endif ifeq ($(check_feat),1) ifeq ($(FEATURES_DUMP),) include $(srctree)/tools/build/Makefile.feature else include $(FEATURES_DUMP) endif endif export prefix libdir src obj # Shell quotes libdir_SQ = $(subst ','\'',$(libdir)) libdir_relative_SQ = $(subst ','\'',$(libdir_relative)) plugin_dir_SQ = $(subst ','\'',$(plugin_dir)) LIB_FILE = libbpf.a libbpf.so VERSION = $(BPF_VERSION) PATCHLEVEL = $(BPF_PATCHLEVEL) EXTRAVERSION = $(BPF_EXTRAVERSION) OBJ = $@ N = LIBBPF_VERSION = $(BPF_VERSION).$(BPF_PATCHLEVEL).$(BPF_EXTRAVERSION) # Set compile option CFLAGS ifdef EXTRA_CFLAGS CFLAGS := $(EXTRA_CFLAGS) else CFLAGS := -g -Wall endif ifeq ($(feature-libelf-mmap), 1) override CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT endif ifeq ($(feature-libelf-getphdrnum), 1) override CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT endif # Append required CFLAGS override CFLAGS += $(EXTRA_WARNINGS) override CFLAGS += -Werror -Wall override CFLAGS += -fPIC override CFLAGS += $(INCLUDES) ifeq ($(VERBOSE),1) Q = else Q = @ endif # Disable command line variables (CFLAGS) overide from top # level Makefile (perf), otherwise build Makefile will get # the same command line setup. MAKEOVERRIDES= all: export srctree OUTPUT CC LD CFLAGS V include $(srctree)/tools/build/Makefile.include BPF_IN := $(OUTPUT)libbpf-in.o LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE)) CMD_TARGETS = $(LIB_FILE) TARGETS = $(CMD_TARGETS) all: fixdep $(VERSION_FILES) all_cmd all_cmd: $(CMD_TARGETS) $(BPF_IN): force elfdep bpfdep @(test -f ../../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \ (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \ echo "Warning: tools/include/uapi/linux/bpf.h differs from kernel" >&2 )) || true @(test -f ../../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \ (diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \ echo "Warning: tools/include/uapi/linux/bpf_common.h differs from kernel" >&2 )) || true $(Q)$(MAKE) $(build)=libbpf $(OUTPUT)libbpf.so: $(BPF_IN) $(QUIET_LINK)$(CC) --shared $^ -o $@ $(OUTPUT)libbpf.a: $(BPF_IN) $(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^ define update_dir (echo $1 > $@.tmp; \ if [ -r $@ ] && cmp -s $@ $@.tmp; then \ rm -f $@.tmp; \ else \ echo ' UPDATE $@'; \ mv -f $@.tmp $@; \ fi); endef define do_install if [ ! -d '$(DESTDIR_SQ)$2' ]; then \ $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \ fi; \ $(INSTALL) $1 '$(DESTDIR_SQ)$2' endef install_lib: all_cmd $(call QUIET_INSTALL, $(LIB_FILE)) \ $(call do_install,$(LIB_FILE),$(libdir_SQ)) install: install_lib ### Cleaning rules config-clean: $(call QUIET_CLEAN, config) $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null clean: $(call QUIET_CLEAN, libbpf) $(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d .*.cmd \ $(RM) LIBBPF-CFLAGS $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf PHONY += force elfdep bpfdep force: elfdep: @if [ "$(feature-libelf)" != "1" ]; then echo "No libelf found"; exit -1 ; fi bpfdep: @if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit -1 ; fi # Declare the contents of the .PHONY variable as phony. We keep that # information in a variable so we can use it in if_changed and friends. .PHONY: $(PHONY) d> parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/usb/musb/musbhsdma.c')