drivers/md/raid5.c

1273 				 * must be preparing for prexor in rmw; read
1837 		 * raid5-cache write back uses orig_page during prexor.
1838 		 * After prexor, it is time to free orig_page
2037 	int prexor = 0;
2062 	/* check if prexor is active which means only process blocks
2066 		prexor = 1;
2089 	/* 1/ if we prexor'd then the dest is reused as a source
2090 	 * 2/ if we did not prexor then we are redoing the parity
2099 			(prexor ? ASYNC_TX_XOR_DROP_DST : ASYNC_TX_XOR_ZERO_DST);
2105 		flags = prexor ? ASYNC_TX_XOR_DROP_DST : ASYNC_TX_XOR_ZERO_DST;
2760 			 * must be preparing for prexor in rmw
3278  *      necessary to handle complex rmw of write back cache (prexor with
3334 		 * run rmw and allocates extra page for prexor. However, rcw is
3958 		 * back cache (prexor with orig_page, and then xor with
4080  * For RMW in write back cache, we need extra page in prexor to store the
4083  * This function checks whether we have data for prexor. The exact logic
4159 				/* alloc page for prexor */
4886 	int prexor;
4987 	prexor = 0;
4989 		prexor = 1;
5010 				if (prexor)