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ab77dab462
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Souptick Joarder ab77dab462 fs/dax.c: use new return type vm_fault_t 
Use new return type vm_fault_t for fault handler.  For now, this is just
documenting that the function returns a VM_FAULT value rather than an
errno.  Once all instances are converted, vm_fault_t will become a
distinct type.

commit 1c8f422059 ("mm: change return type to vm_fault_t")

There was an existing bug inside dax_load_hole() if vm_insert_mixed had
failed to allocate a page table, we'd return VM_FAULT_NOPAGE instead of
VM_FAULT_OOM.  With new vmf_insert_mixed() this issue is addressed.

vm_insert_mixed_mkwrite has inefficiency when it returns an error value,
driver has to convert it to vm_fault_t type.  With new
vmf_insert_mixed_mkwrite() this limitation will be addressed.

Link: http://lkml.kernel.org/r/20180510181121.GA15239@jordon-HP-15-Notebook-PC
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-07 17:34:33 -07:00
..
acpi * Stratix10 SDRAM support to altera_edac (Thor Thayer) 2018-06-06 15:36:13 -07:00
asm-generic Kbuild updates for v4.18 2018-06-06 11:00:15 -07:00
clocksource
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-06-05 15:51:21 -07:00
drm drm for v4.18-rc1 2018-06-06 08:16:33 -07:00
dt-bindings Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-06-06 18:39:49 -07:00
keys
kvm
linux fs/dax.c: use new return type vm_fault_t 2018-06-07 17:34:33 -07:00
math-emu
media media: v4l2-core: push taking ioctl mutex down to ioctl handler 2018-05-28 16:31:44 -04:00
memory
misc ocxl: Expose the thread_id needed for wait on POWER9 2018-06-03 20:40:32 +10:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-06-06 18:39:49 -07:00
pcmcia
ras
rdma IB/uverbs: Fix uverbs_attr_get_obj 2018-05-23 15:25:53 -06:00
scsi block: rename BLK_EH_NOT_HANDLED to BLK_EH_DONE 2018-05-29 08:59:21 -06:00
soc
sound sound updates for 4.18 2018-06-06 09:08:38 -07:00
target
trace Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-06-06 18:39:49 -07:00
uapi media updates for v4.18-rc1 2018-06-07 12:34:37 -07:00
video media: include/video/omapfb_dss.h: use IS_ENABLED() 2018-05-05 11:45:51 -04:00
xen