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linux/arch/arc
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Vineet Gupta 1097163870 ARCv2: spinlock/rwlock/atomics: reduce 1 instruction in exponential backoff 
The increment of delay counter was 2 instructions:
Arithmatic Shfit Left (ASL) + set to 1 on overflow

This can be done in 1 using ROtate Left (ROL)

Suggested-by: Nigel Topham <ntopham@synopsys.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
History 2015-08-07 13:56:16 +05:30
..
boot ARCv2: [axs103] bump CPU frequency from 75 to 90 MHZ 2015-07-09 17:36:31 +05:30
configs ARCv2: [vdk] dts files and defconfig for HS38 VDK 2015-06-25 06:00:21 +05:30
include ARCv2: spinlock/rwlock/atomics: reduce 1 instruction in exponential backoff 2015-08-07 13:56:16 +05:30
kernel ARCv2: spinlock/rwlock/atomics: Delayed retry of failed SCOND with exponential backoff 2015-08-04 09:26:34 +05:30
lib ARCv2: lib: memset: Don't assume 64-bit load/stores 2015-07-20 17:44:37 +03:00
mm ARC: Don't memzero twice in dma_alloc_coherent for __GFP_ZERO 2015-07-06 11:09:01 +05:30
oprofile ARC: OProfile support 2013-02-15 23:16:00 +05:30
plat-axs10x ARCv2: [axs103_smp] Reduce clk for Quad FPGA configs 2015-08-04 09:26:30 +05:30
plat-sim ARCv2: [nsim*hs*] Support simulation platforms for HS38x cores 2015-06-25 06:00:19 +05:30
plat-tb10x ARC: [plat*] move code out of .init_machine into common 2014-10-13 14:46:13 +05:30
Kbuild ARC: Build system: Makefiles, Kconfig, Linker script 2013-02-11 20:00:25 +05:30
Kconfig ARCv2: spinlock/rwlock/atomics: Delayed retry of failed SCOND with exponential backoff 2015-08-04 09:26:34 +05:30
Kconfig.debug ARC: With earlycon in use, retire EARLY_PRINTK 2015-05-11 11:20:21 +05:30
Makefile ARCv2: add knob for DIV_REV in Kconfig 2015-07-20 13:33:30 +03:00