Commit ed80cc75 authored by Vlastimil Babka's avatar Vlastimil Babka
Browse files

Merge branch 'slab/for-6.19/freelist_aba_t_cleanups' into slab/for-next 

Merge series "slab: cmpxchg cleanups enabled by -fms-extensions"

From the cover letter [1]:

After learning about -fms-extensions being enabled for 6.19, I realized
there is some cleanup potential in slub code by extending the definition
and usage of freelist_aba_t, as it can now become an unnamed member of
struct slab. This series performs the cleanup, with no functional
changes intended. Additionally we turn freelist_aba_t to struct
freelist_counters as it doesn't meet any criteria for being a typedef,
per Documentation/process/coding-style.rst

Based on the tag kbuild-ms-extensions-6.19 from
git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linuxV

Link: https://lore.kernel.org/all/20251107-slab-fms-cleanup-v1-0-650b1491ac9e@suse.cz/#t [1]
parents e5d7764e c33196c9

Makefile

+3 −0
Original line number Diff line number Diff line
@@ -1061,6 +1061,9 @@ NOSTDINC_FLAGS += -nostdinc 
# perform bounds checking.

KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3)



# Allow including a tagged struct or union anonymously in another struct/union.

KBUILD_CFLAGS += -fms-extensions



# disable invalid "can't wrap" optimizations for signed / pointers

KBUILD_CFLAGS	+= -fno-strict-overflow

arch/arm64/kernel/vdso32/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -63,7 +63,7 @@ VDSO_CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 
               $(filter -Werror,$(KBUILD_CPPFLAGS)) \

               -Werror-implicit-function-declaration \

               -Wno-format-security \

               -std=gnu11

               -std=gnu11 -fms-extensions

VDSO_CFLAGS  += -O2

# Some useful compiler-dependent flags from top-level Makefile

VDSO_CFLAGS += $(call cc32-option,-Wno-pointer-sign)
@@ -71,6 +71,7 @@ VDSO_CFLAGS += -fno-strict-overflow 
VDSO_CFLAGS += $(call cc32-option,-Werror=strict-prototypes)

VDSO_CFLAGS += -Werror=date-time

VDSO_CFLAGS += $(call cc32-option,-Werror=incompatible-pointer-types)

VDSO_CFLAGS += $(if $(CONFIG_CC_IS_CLANG),-Wno-microsoft-anon-tag)



# Compile as THUMB2 or ARM. Unwinding via frame-pointers in THUMB2 is

# unreliable.

arch/loongarch/vdso/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -19,7 +19,7 @@ ccflags-vdso := \ 
cflags-vdso := $(ccflags-vdso) \

	-isystem $(shell $(CC) -print-file-name=include) \

	$(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \

	-std=gnu11 -O2 -g -fno-strict-aliasing -fno-common -fno-builtin \

	-std=gnu11 -fms-extensions -O2 -g -fno-strict-aliasing -fno-common -fno-builtin \

	-fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \

	$(call cc-option, -fno-asynchronous-unwind-tables) \

	$(call cc-option, -fno-stack-protector)

arch/parisc/boot/compressed/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -18,7 +18,7 @@ KBUILD_CFLAGS += -fno-PIE -mno-space-regs -mdisable-fpregs -Os 
ifndef CONFIG_64BIT

KBUILD_CFLAGS += -mfast-indirect-calls

endif

KBUILD_CFLAGS += -std=gnu11

KBUILD_CFLAGS += -std=gnu11 -fms-extensions



LDFLAGS_vmlinux := -X -e startup --as-needed -T

$(obj)/vmlinux: $(obj)/vmlinux.lds $(addprefix $(obj)/, $(OBJECTS)) $(LIBGCC) FORCE

arch/powerpc/boot/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -70,7 +70,7 @@ BOOTCPPFLAGS := -nostdinc $(LINUXINCLUDE) 
BOOTCPPFLAGS	+= -isystem $(shell $(BOOTCC) -print-file-name=include)



BOOTCFLAGS	:= $(BOOTTARGETFLAGS) \

		   -std=gnu11 \

		   -std=gnu11 -fms-extensions \

		   -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \

		   -fno-strict-aliasing -O2 \

		   -msoft-float -mno-altivec -mno-vsx \
@@ -86,6 +86,7 @@ BOOTARFLAGS := -crD 


ifdef CONFIG_CC_IS_CLANG

BOOTCFLAGS += $(CLANG_FLAGS)

BOOTCFLAGS += -Wno-microsoft-anon-tag

BOOTAFLAGS += $(CLANG_FLAGS)

endif