On 03/09/2014 11:19 PM, Chen Gang wrote: > On 03/09/2014 06:17 AM, Hans-Christian Egtvedt wrote: >> Around Sun 09 Mar 2014 05:47:04 +0800 or thereabout, Chen Gang wrote: >>> >>> After this patch, our linux kernel can pass "avr32-linux-" allmodconfig >>> (it contents quite a few of warnings, but after check, I guess they are >>> not kernel's issue). >> >> That sounds great, I am a bit surprised however that the lkdtm module need >> flush_icache_range. Would have been interesting to look into what causes this >> dependency. >>
After read a little more details for lkdtm, I guess "after overwrite an executable area by do_nothing(), it needs flush_icache_range() to be sure the new instructions/data must have effect with all cpu". Welcome any additional information for it. Thanks. > > "driver/misc/lkdtm.c" will use this flush_icache_range(). > > And some architectures export it to modules. > > [root@gchen arch]# grep -rn flush_icache_range * | grep EXPORT > arm64/mm/flush.c:105:EXPORT_SYMBOL(flush_icache_range); > avr32/mm/cache.c:114:EXPORT_SYMBOL(flush_icache_range); > m68k/mm/cache.c:106:EXPORT_SYMBOL(flush_icache_range); > mn10300/mm/cache-inv-icache.c:129:EXPORT_SYMBOL(flush_icache_range); > mn10300/mm/cache-flush-icache.c:155:EXPORT_SYMBOL(flush_icache_range); > sparc/mm/init_64.c:435:EXPORT_SYMBOL(flush_icache_range); > > > Welcome any more details information by any other members, thanks. > > Thanks. -- Chen Gang Open, share and attitude like air, water and life which God blessed -- 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/
