> On Jul 31, 2015, at 15:52, Peter Zijlstra <pet...@infradead.org> wrote: > > On Fri, Jul 31, 2015 at 03:41:37PM +0800, yalin wang wrote: >> This change a little arch_static_branch(), use b . + 4 for false >> return, why? According to aarch64 TRM, if both source and dest >> instr are branch instr, can patch the instr directly, don't need >> all cpu to do ISB for sync, this means we can call >> aarch64_insn_patch_text_nosync() during patch_text(), >> will improve the performance when change a static_key. > > This doesn't parse.. What? > > Also, this conflicts with the jump label patches I've got.
this is arch depend , you can see aarch64_insn_patch_text( ) for more info, if aarch64_insn_hotpatch_safe() is true, will patch the text directly. what is your git branch base? i make the patch based on linux-next branch, maybe a little delay than yours , could you share your branch git address? i can make a new based on yours . Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
