Revision 9f141d6ef6258a3a37a045842d9ba7e68f368956 authored by Jan Kara on 19 October 2016, 12:34:31 UTC, committed by Dan Williams on 27 December 2016, 04:29:25 UTC
Currently ->iomap_begin() handler is called with entry lock held. If the filesystem held any locks between ->iomap_begin() and ->iomap_end() (such as ext4 which will want to hold transaction open), this would cause lock inversion with the iomap_apply() from standard IO path which first calls ->iomap_begin() and only then calls ->actor() callback which grabs entry locks for DAX (if it faults when copying from/to user provided buffers). Fix the problem by nesting grabbing of entry lock inside ->iomap_begin() - ->iomap_end() pair. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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| File | Mode | Size |
|---|---|---|
| BUGS-parport | -rw-r--r-- | 319 bytes |
| Kconfig | -rw-r--r-- | 5.4 KB |
| Makefile | -rw-r--r-- | 693 bytes |
| TODO-parport | -rw-r--r-- | 594 bytes |
| daisy.c | -rw-r--r-- | 12.3 KB |
| ieee1284.c | -rw-r--r-- | 22.6 KB |
| ieee1284_ops.c | -rw-r--r-- | 23.2 KB |
| multiface.h | -rw-r--r-- | 387 bytes |
| parport_amiga.c | -rw-r--r-- | 6.3 KB |
| parport_atari.c | -rw-r--r-- | 5.4 KB |
| parport_ax88796.c | -rw-r--r-- | 9.3 KB |
| parport_cs.c | -rw-r--r-- | 5.5 KB |
| parport_gsc.c | -rw-r--r-- | 11.0 KB |
| parport_gsc.h | -rw-r--r-- | 6.1 KB |
| parport_ip32.c | -rw-r--r-- | 67.0 KB |
| parport_mfc3.c | -rw-r--r-- | 9.9 KB |
| parport_pc.c | -rw-r--r-- | 85.4 KB |
| parport_serial.c | -rw-r--r-- | 20.1 KB |
| parport_sunbpp.c | -rw-r--r-- | 9.3 KB |
| probe.c | -rw-r--r-- | 7.4 KB |
| procfs.c | -rw-r--r-- | 12.6 KB |
| share.c | -rw-r--r-- | 36.7 KB |
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