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Linux 2.6.36 compat, synchronous bio flag

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The name of the flag used to mark a bio as synchronous has changed
again in the 2.6.36 kernel due to the unification of the BIO_RW_*
and REQ_* flags.  The new flag is called REQ_SYNC.  To simplify
checking this flag I have introduced the vdev_disk_dio_is_sync()
helper function.  Based on the results of several new autoconf
tests it uses the correct mask to check for a synchronous bio.

Preferred interface for flagging a synchronous bio:
  2.6.12-2.6.29: BIO_RW_SYNC
  2.6.30-2.6.35: BIO_RW_SYNCIO
  2.6.36-2.6.xx: REQ_SYNC
This commit is contained in:
Brian Behlendorf
2010-11-10 15:49:40 -08:00
parent f4af6bb783
commit 675de5aa37
6 changed files with 330 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/sys/vdev_disk.h
-7
View File
@@ -58,13 +58,6 @@ extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
# define BIO_END_IO_RETURN(rc) return rc
#endif /* HAVE_2ARGS_BIO_END_IO_T */
/* 2.6.29 API change */
#ifdef HAVE_BIO_RW_SYNCIO
# define DIO_RW_SYNCIO BIO_RW_SYNCIO
#else
# define DIO_RW_SYNCIO BIO_RW_SYNC
#endif /* HAVE_BIO_RW_SYNCIO */
/* 2.6.28 API change */
#ifdef HAVE_OPEN_BDEV_EXCLUSIVE
# define vdev_bdev_open(path, md, hld) open_bdev_exclusive(path, md, hld)