Martin K. Petersen 98262f2762 block: Allow devices to indicate whether discarded blocks are zeroed ... The discard ioctl is used by mkfs utilities to clear a block device prior to putting metadata down. However, not all devices return zeroed blocks after a discard. Some drives return stale data, potentially containing old superblocks. It is therefore important to know whether discarded blocks are properly zeroed. Both ATA and SCSI drives have configuration bits that indicate whether zeroes are returned after a discard operation. Implement a block level interface that allows this information to be bubbled up the stack and queried via a new block device ioctl. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2009-12-03 09:24:48 +01:00
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acpi
asm-generic
crypto
drm
keys
linux	block: Allow devices to indicate whether discarded blocks are zeroed	2009-12-03 09:24:48 +01:00
math-emu
media
mtd
net
pcmcia
rdma
rxrpc
scsi
sound
trace
video
xen
Kbuild