On Sun, Oct 06, 2013 at 05:30:47PM -0500, Joel Fernandes wrote: > On receiving IRQ exception in SVC mode, all the SVC mode registers are saved > onto the stack very early on. > > The stack frame allocation code for IRQ entry during SVC mode (svc_entry) is > hard to read as 4-less is allocated initially only to be allocated later > implicity using the mov r3, [sp, #-4]! instruction. We make code easier to > read > by allocating the 4 bytes on the stack frame in the beginning itself and > remove > all instances where 4 bytes is adjusted.
You omit to say that this results in saving one additional register unnecessarily in the stmia. We could use a stmib there instead which would avoid that issue while keeping the rest of the change. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
