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 |
|---|---|---|
| ad1816a | ||
| ad1848 | ||
| cs423x | ||
| es1688 | ||
| galaxy | ||
| gus | ||
| msnd | ||
| opti9xx | ||
| sb | ||
| wavefront | ||
| wss | ||
| Kconfig | -rw-r--r-- | 12.5 KB |
| Makefile | -rw-r--r-- | 857 bytes |
| adlib.c | -rw-r--r-- | 2.6 KB |
| als100.c | -rw-r--r-- | 10.3 KB |
| azt2320.c | -rw-r--r-- | 9.6 KB |
| cmi8328.c | -rw-r--r-- | 13.3 KB |
| cmi8330.c | -rw-r--r-- | 22.5 KB |
| es18xx.c | -rw-r--r-- | 69.3 KB |
| opl3sa2.c | -rw-r--r-- | 28.9 KB |
| sc6000.c | -rw-r--r-- | 17.7 KB |
| sscape.c | -rw-r--r-- | 32.6 KB |
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