IB/hfi1: Specify mm when releasing pages

Browse source

This change adds a pointer to the process mm_struct when
calling hfi1_release_user_pages().

Previously, the function used the mm_struct of the current
process to adjust the number of pinned pages. However, is some
cases, namely when unpinning pages due to a MMU notifier call,
we want to drop into that code block as it will cause a deadlock
(the MMU notifiers take the process' mmap_sem prior to calling
the callbacks).

By allowing to caller to specify the pointer to the mm_struct,
the caller has finer control over that part of hfi1_release_user_pages().

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

...

This commit is contained in:

Mitko Haralanov 2016-03-08 11:15:33 -08:00 • committed by Doug Ledford

parent 2c97ce4f3c

commit bd3a8947de

4 changed files with 22 additions and 14 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

drivers/staging/rdma/hfi1/hfi.h

View file

4

drivers/staging/rdma/hfi1/user_exp_rcv.c

View file

11

drivers/staging/rdma/hfi1/user_pages.c

View file

19

drivers/staging/rdma/hfi1/user_sdma.c

View file