[PATCH] reorder 'rep;nop;' in the spinlock macro
According to Intel's recommendation, 'rep;nop; should be called before testing if the lock variable was modified (i.e. rep nop;cmp;jcc). The current implementation does it the wrong way around: first test, then wait, then branch. I've asked Asit Mallik from Intel, and he recommended to change it. It should be at least consistent: Right now, spinlock uses 'cmp;rep nop;jcc', rwlock uses 'rep nop;cmp;jcc'
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