On Monday 12 November 2012 07:30 PM, Arnd Bergmann wrote: > On Monday 12 November 2012, vineet.gup...@synopsys.com wrote: >> + >> +config ARC_MISALIGN_ACCESS >> + bool "Emulate unaligned memory access (userspace only)" >> + default N >> + help >> + This enables misaligned 16 & 32 bit memory access from user space. >> + Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide >> + potential bugs in code > > parisc and ia64 both have the same feature, and they use sysctl to configure > it at run-time. Maybe you should pick one of the two sysctl implementations > and hook that up to your implementation as well.
Spoke too soon ! The only caveat to removing the Kconfig option is that it will pull-in unaligned emulation code as well as the dependent in-kernel disassembler unconditionally into the build. Are you OK if we keep this support build time - provided that once it is build time enabled - we have the additional runtime sysctl based toggle-ability as you suggested. Only one of our customers need this feature and this gives people reasons to moan about the kernel .text size and such. Thanks, Vineet -- 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/
