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Author SHA1 Message Date
Will Deacon 915530396c Documentation: Kill all references to mmiowb() 
The guarantees provided by mmiowb() are now provided implicitly by
spin_unlock(), so remove all references to this most confusing of
barriers from our Documentation.

Good riddance.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
 2019-04-08 12:00:45 +01:00
Randy Dunlap fcf9ab35ba PCI/P2PDMA: Clean up documentation and kernel-doc 
Fix typos, spellos, and grammar in p2pdma.rst and p2pdma.c.

Fix return value(s) in function pci_p2pmem_alloc_sgl().

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Jonathan Corbet <corbet@lwn.net>
 2018-12-11 07:53:07 -06:00
Logan Gunthorpe e4f7a94803 PCI/P2PDMA: Add P2P DMA driver writer's documentation 
Add a restructured text file describing how to write drivers with support
for P2P DMA transactions.  The document describes how to use the APIs that
were added in the previous few commits.

Also adds an index for the PCI documentation tree even though this is the
only PCI document that has been converted to restructured text at this
time.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
 2018-10-17 12:18:18 -05:00