Messages in this thread Patch in this message | | | Date | Sun, 12 Feb 2006 18:48:02 +0100 | From | Adrian Bunk <> | Subject | [RFC: 2.6 patch] remove the CONFIG_CC_ALIGN_* options |
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I don't see any use case for the CONFIG_CC_ALIGN_* options: - they are only available if EMBEDDED - people using EMBEDDED will most likely also enable CC_OPTIMIZE_FOR_SIZE - the default for -Os is to disable alignment
Signed-off-by: Adrian Bunk <bunk@stusta.de>
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Makefile | 7 ------- init/Kconfig | 37 ------------------------------------- 2 files changed, 44 deletions(-)
--- linux-2.6.16-rc2-mm1-full/init/Kconfig.old 2006-02-12 15:30:08.000000000 +0100 +++ linux-2.6.16-rc2-mm1-full/init/Kconfig 2006-02-12 15:30:53.000000000 +0100 @@ -353,45 +353,8 @@ to userspace as tmpfs if TMPFS is enabled. Disabling this option replaces shmem and tmpfs with the much simpler ramfs code, which may be appropriate on small systems without swap. -config CC_ALIGN_FUNCTIONS - int "Function alignment" if EMBEDDED - default 0 - help - Align the start of functions to the next power-of-two greater than n, - skipping up to n bytes. For instance, 32 aligns functions - to the next 32-byte boundary, but 24 would align to the next - 32-byte boundary only if this can be done by skipping 23 bytes or less. - Zero means use compiler's default. - -config CC_ALIGN_LABELS - int "Label alignment" if EMBEDDED - default 0 - help - Align all branch targets to a power-of-two boundary, skipping - up to n bytes like ALIGN_FUNCTIONS. This option can easily - make code slower, because it must insert dummy operations for - when the branch target is reached in the usual flow of the code. - Zero means use compiler's default. - -config CC_ALIGN_LOOPS - int "Loop alignment" if EMBEDDED - default 0 - help - Align loops to a power-of-two boundary, skipping up to n bytes. - Zero means use compiler's default. - -config CC_ALIGN_JUMPS - int "Jump alignment" if EMBEDDED - default 0 - help - Align branch targets to a power-of-two boundary, for branch - targets where the targets can only be reached by jumping, - skipping up to n bytes like ALIGN_FUNCTIONS. In this case, - no dummy operations need be executed. - Zero means use compiler's default. - config SLAB default y bool "Use full SLAB allocator" if EMBEDDED help --- linux-2.6.16-rc2-mm1-full/Makefile.old 2006-02-12 15:30:59.000000000 +0100 +++ linux-2.6.16-rc2-mm1-full/Makefile 2006-02-12 15:31:24.000000000 +0100 @@ -473,15 +473,8 @@ else CFLAGS += -O2 endif -#Add align options if CONFIG_CC_* is not equal to 0 -add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) -CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) -CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) -CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) -CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) - ifdef CONFIG_FRAME_POINTER CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) else CFLAGS += -fomit-frame-pointer - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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