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Date: Mon, 11 Mar 2019 14:17:38 +0100 From: "Enrico Weigelt, metux IT consult" <info@...ux.net> To: linux-kernel@...r.kernel.org Subject: [PATCH 026/114] arch: Kconfig: pedantic formatting Formatting of Kconfig files doesn't look so pretty, so let the Great White Handkerchief come around and clean it up. Signed-off-by: Enrico Weigelt, metux IT consult <info@...ux.net> --- arch/Kconfig | 94 ++++++++++++++++++++++++++++++------------------------------ 1 file changed, 47 insertions(+), 47 deletions(-) diff --git a/arch/Kconfig b/arch/Kconfig index 33687dd..41f9c4b 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -69,30 +69,30 @@ config KPROBES If in doubt, say "N". config JUMP_LABEL - bool "Optimize very unlikely/likely branches" - depends on HAVE_ARCH_JUMP_LABEL - depends on CC_HAS_ASM_GOTO - help - This option enables a transparent branch optimization that - makes certain almost-always-true or almost-always-false branch - conditions even cheaper to execute within the kernel. - - Certain performance-sensitive kernel code, such as trace points, - scheduler functionality, networking code and KVM have such - branches and include support for this optimization technique. - - If it is detected that the compiler has support for "asm goto", - the kernel will compile such branches with just a nop - instruction. When the condition flag is toggled to true, the - nop will be converted to a jump instruction to execute the - conditional block of instructions. - - This technique lowers overhead and stress on the branch prediction - of the processor and generally makes the kernel faster. The update - of the condition is slower, but those are always very rare. - - ( On 32-bit x86, the necessary options added to the compiler - flags may increase the size of the kernel slightly. ) + bool "Optimize very unlikely/likely branches" + depends on HAVE_ARCH_JUMP_LABEL + depends on CC_HAS_ASM_GOTO + help + This option enables a transparent branch optimization that + makes certain almost-always-true or almost-always-false branch + conditions even cheaper to execute within the kernel. + + Certain performance-sensitive kernel code, such as trace points, + scheduler functionality, networking code and KVM have such + branches and include support for this optimization technique. + + If it is detected that the compiler has support for "asm goto", + the kernel will compile such branches with just a nop + instruction. When the condition flag is toggled to true, the + nop will be converted to a jump instruction to execute the + conditional block of instructions. + + This technique lowers overhead and stress on the branch prediction + of the processor and generally makes the kernel faster. The update + of the condition is slower, but those are always very rare. + + ( On 32-bit x86, the necessary options added to the compiler + flags may increase the size of the kernel slightly. ) config STATIC_KEYS_SELFTEST bool "Static key selftest" @@ -110,9 +110,9 @@ config KPROBES_ON_FTRACE depends on KPROBES && HAVE_KPROBES_ON_FTRACE depends on DYNAMIC_FTRACE_WITH_REGS help - If function tracer is enabled and the arch supports full - passing of pt_regs to function tracing, then kprobes can - optimize on top of function tracing. + If function tracer is enabled and the arch supports full + passing of pt_regs to function tracing, then kprobes can + optimize on top of function tracing. config UPROBES def_bool n @@ -164,23 +164,23 @@ config HAVE_EFFICIENT_UNALIGNED_ACCESS information on the topic of unaligned memory accesses. config ARCH_USE_BUILTIN_BSWAP - bool - help - Modern versions of GCC (since 4.4) have builtin functions - for handling byte-swapping. Using these, instead of the old - inline assembler that the architecture code provides in the - __arch_bswapXX() macros, allows the compiler to see what's - happening and offers more opportunity for optimisation. In - particular, the compiler will be able to combine the byteswap - with a nearby load or store and use load-and-swap or - store-and-swap instructions if the architecture has them. It - should almost *never* result in code which is worse than the - hand-coded assembler in <asm/swab.h>. But just in case it - does, the use of the builtins is optional. - - Any architecture with load-and-swap or store-and-swap - instructions should set this. And it shouldn't hurt to set it - on architectures that don't have such instructions. + bool + help + Modern versions of GCC (since 4.4) have builtin functions + for handling byte-swapping. Using these, instead of the old + inline assembler that the architecture code provides in the + __arch_bswapXX() macros, allows the compiler to see what's + happening and offers more opportunity for optimisation. In + particular, the compiler will be able to combine the byteswap + with a nearby load or store and use load-and-swap or + store-and-swap instructions if the architecture has them. It + should almost *never* result in code which is worse than the + hand-coded assembler in <asm/swab.h>. But just in case it + does, the use of the builtins is optional. + + Any architecture with load-and-swap or store-and-swap + instructions should set this. And it shouldn't hurt to set it + on architectures that don't have such instructions. config KRETPROBES def_bool y @@ -234,10 +234,10 @@ config HAVE_DMA_CONTIGUOUS bool config GENERIC_SMP_IDLE_THREAD - bool + bool config GENERIC_IDLE_POLL_SETUP - bool + bool config ARCH_HAS_FORTIFY_SOURCE bool @@ -251,7 +251,7 @@ config ARCH_HAS_SET_MEMORY # Select if arch init_task must go in the __init_task_data section config ARCH_TASK_STRUCT_ON_STACK - bool + bool # Select if arch has its private alloc_task_struct() function config ARCH_TASK_STRUCT_ALLOCATOR -- 1.9.1
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