Hi Shailendra, On Thu, May 21, 2015 at 12:35:46AM +0530, Shailendra Verma wrote: > Here in for loop the instruction "len / sizeof(compat_long_t)" is used > as a terminating condition which is executing (being computed) in every > iteration of for loop. Below is the armv7-a architecture assembly code with > similar for loop having the same instruction in condition.Note that the > instruction "lsr r3, r3, #2" i.e Logical Shift Right on behalf of > "len / sizeof(compat_long_t)" is getting executed every time the loop > iterates.
No, it is not. We compile kernel with -O2 and compiler is smart enough to optimize such constructs. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
