user/sven/linux.git/arch/arc/lib, branch v4.20

ARC: dw2 unwind: enable cfi pseudo ops in string lib

2016-09-30T21:48:22Z

This uses a new set of annoations viz. ENTRY_CFI/END_CFI to enabel cfi ops generation. Note that we didn't change the normal ENTRY/EXIT as we don't actually want unwind info in the trap/exception/interrutp handlers which use these, as unwinder then gets confused (it keeps recursing vs. stopping). Semantically these are leaf routines and unwinding should stop when it hits those routines. Before ------ 28.52% 1.19% 9929 hackbench libuClibc-1.0.17.so [.] __write_nocancel | ---__write_nocancel |--8.95%--EV_Trap | --8.25%--sys_write | |--3.93%--sock_write_iter ... |--2.62%--memset <==== [LEAF entry as no unwind info] ^^^^^^ After ----- 29.46% 1.24% 13622 hackbench libuClibc-1.0.17.so [.] __write_nocancel | ---__write_nocancel |--9.31%--EV_Trap | --8.62%--sys_write | |--4.17%--sock_write_iter ... |--6.19%--sys_write | --6.19%--sock_write_iter | unix_stream_sendmsg | |--1.62%--sock_alloc_send_pskb | |--0.89%--sock_def_readable | |--0.88%--_raw_spin_unlock_irqrestore | |--0.69%--memset | | ^^^^^^ <==== [now in proper callframe] | | | --0.52%--skb_copy_datagram_from_iter Signed-off-by: Vineet Gupta

ARCv2: lib: memcpy: use local symbols

2015-11-03T12:03:00Z

Otherwise perf profiles don't charge tme to memcpy Signed-off-by: Vineet Gupta

ARCv2: lib: memset: Don't assume 64-bit load/stores

2015-07-20T14:44:37Z

There are configurations which may not have LDD/STD Signed-off-by: Claudiu Zissulescu Signed-off-by: Alexey Brodkin Signed-off-by: Vineet Gupta

ARCv2: lib: memcpy: Missing PREFETCHW

2015-07-20T14:27:35Z

Signed-off-by: Vineet Gupta

ARCv2: Adhere to Zero Delay loop restriction

2015-06-22T08:36:56Z

Branch insn can't be scheduled as last insn of Zero Overhead loop Signed-off-by: Vineet Gupta

ARCv2: optimised string/mem lib routines

2015-06-22T08:36:56Z

Signed-off-by: Vineet Gupta

ARC: switch to generic ENTRY/END assembler annotations

2014-03-26T09:01:28Z

With commit 9df62f054406 "arch: use ASM_NL instead of ';'" the generic macros can handle the arch specific newline quirk. Hence we can get rid of ARC asm macros and use the "C" style macros. Signed-off-by: Vineet Gupta

ARC: [lib] strchr breakage in Big-endian configuration

2013-08-24T18:24:53Z

For a search buffer, 2 byte aligned, strchr() was returning pointer outside of buffer (buf - 1) ------------->8---------------- // Input buffer (default 4 byte aigned) char *buffer = "1AA_"; // actual search start (to mimick 2 byte alignment) char *current_line = &(buffer[2]); // Character to search for char c = 'A'; char *c_pos = strchr(current_line, c); printf("%s\n", c_pos) --> 'AA_' as oppose to 'A_' ------------->8---------------- Reported-by: Anton Kolesov Debugged-by: Anton Kolesov Cc: # [3.9 and 3.10] Cc: Noam Camus Signed-off-by: Joern Rennecke Signed-off-by: Vineet Gupta Signed-off-by: Linus Torvalds

ARC: String library

2013-02-11T14:30:35Z

Hand optimised asm code for ARC700 pipeline. Originally written/optimized by Joern Rennecke Signed-off-by: Vineet Gupta Cc: Joern Rennecke

ARC: Build system: Makefiles, Kconfig, Linker script

2013-02-11T14:30:25Z

Arnd in his review pointed out that arch Kconfig organisation has several deficiencies: * Build time entries for things which can be runtime extracted from DT (e.g. SDRAM size, core clk frequency..) * Not multi-platform-image-build friendly (choice .. endchoice constructs) * cpu variants support (750/770) is exclusive. The first 2 have been fixed in subsequent patches. Due to the nature of the 750 and 770, it is not possible to build for both together, w/o special runtime glue code which would hurt performance. Signed-off-by: Vineet Gupta Cc: Arnd Bergmann Cc: Sam Ravnborg Acked-by: Sam Ravnborg