From: "Jan Beulich" Fix a build problem when IDEFLOPPY_DEBUG_BUGS is turned off, and eliminate an access to memory that is no longer allocated (causing systems to fail booting when CONFIG_DEBUG_PAGEALLOC is turned on). Signed-off-by: Jan Beulich Signed-off-by: Andrew Morton --- drivers/ide/ide-floppy.c | 6 ++++++ 1 files changed, 6 insertions(+) diff -puN drivers/ide/ide-floppy.c~ide-floppy-adjustments drivers/ide/ide-floppy.c --- 25/drivers/ide/ide-floppy.c~ide-floppy-adjustments 2005-05-13 22:23:48.000000000 -0700 +++ 25-akpm/drivers/ide/ide-floppy.c 2005-05-13 22:23:48.000000000 -0700 @@ -661,10 +661,12 @@ static void idefloppy_output_buffers (id idefloppy_do_end_request(drive, 1, done >> 9); +#if IDEFLOPPY_DEBUG_BUGS if (bcount) { printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); idefloppy_write_zeros(drive, bcount); } +#endif } static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) @@ -1048,6 +1050,9 @@ static ide_startstop_t idefloppy_issue_p atapi_bcount_t bcount; ide_handler_t *pkt_xfer_routine; +#if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone + and have lived on another thread's stack; that stack may have become + unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */ #if IDEFLOPPY_DEBUG_BUGS if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD && pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { @@ -1055,6 +1060,7 @@ static ide_startstop_t idefloppy_issue_p "Two request sense in serial were issued\n"); } #endif /* IDEFLOPPY_DEBUG_BUGS */ +#endif if (floppy->failed_pc == NULL && pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) _