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Thomas Schmitt 2020-08-11 10:45:00 +00:00
parent dfaa74b1af
commit ae2b697692
1 changed files with 3 additions and 3 deletions
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6
ConcurrentLinuxSr.md

@ -91,12 +91,12 @@ simple. In the source code of kernel 4.19 i edited `drivers/scsi/sr.c`,
included `<scsi/sg.h>` which defines SG_IO, and skipped the mutex calls in
function `sr_block_ioctl()` in case of SG_IO:
```
static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
unsigned long arg)
{
...
#include <scsi/sg.h> /* For number value of ioctl cmd SG_IO */
...
static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
unsigned long arg)
{
...
if (cmd != SG_IO)