Linux-2.5.2

The io_request_lock problem is still present in drivers/scsi/ppa.c:

ppa.c: In function `ppa_detect':
ppa.c:131: `io_request_lock' undeclared (first use in this function) ppa.c:131: (Each undeclared identifier is reported only once ppa.c:131: for each function it appears in.)
ppa.c: In function `ppa_interrupt':
ppa.c:850: `io_request_lock' undeclared (first use in this function) make[2]: *** [ppa.o] Error 1