Vineet Gupta 0a5eae458e ARC: [optim] uaccess __{get,put}_user() optimised ... Override asm-generic implementations. We basically gain on 2 fronts * checks for alignment no longer needed as we are only doing "unit" sized copies. (Careful observer could argue that While the kernel buffers are aligned, the user buffer in theory might not be - however in that case the user space is already broken when it tries to deref a hword/word straddling word boundary - so we are not making it any worse). * __copy_{to,from}_user( ) returns bytes that couldn't be copied, whereas get_user() returns 0 for success or -EFAULT (not size). Thus the code to do leftover bytes calculation can be avoided as well. The savings were significant: ~17k of code. bloat-o-meter vmlinux_uaccess_pre vmlinux_uaccess_post add/remove: 0/4 grow/shrink: 8/118 up/down: 1262/-18758 (-17496) ^^^^^^^^^ Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Arnd Bergmann <arnd@arndb.de>		2013-02-11 20:00:32 +05:30
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boot	ARC: Build system: Makefiles, Kconfig, Linker script	2013-02-11 20:00:25 +05:30
include/asm	ARC: [optim] uaccess __{get,put}_user() optimised	2013-02-11 20:00:32 +05:30
kernel	ARC: irqflags - Interrupt enabling/disabling at in-core intc	2013-02-11 20:00:30 +05:30
lib	ARC: Build system: Makefiles, Kconfig, Linker script	2013-02-11 20:00:25 +05:30
mm	ARC: uaccess friends	2013-02-11 20:00:31 +05:30
plat-arcfpga	ARC: Build system: Makefiles, Kconfig, Linker script	2013-02-11 20:00:25 +05:30
Kbuild	ARC: Build system: Makefiles, Kconfig, Linker script	2013-02-11 20:00:25 +05:30
Kconfig	ARC: Build system: Makefiles, Kconfig, Linker script	2013-02-11 20:00:25 +05:30
Kconfig.debug	ARC: Build system: Makefiles, Kconfig, Linker script	2013-02-11 20:00:25 +05:30
Makefile	ARC: Build system: Makefiles, Kconfig, Linker script	2013-02-11 20:00:25 +05:30