path: root/mm/process_vm_access.c
diff options
authorLorenzo Stoakes <>2016-12-14 15:06:52 -0800
committerLinus Torvalds <>2016-12-14 16:04:08 -0800
commit5b56d49fc31dbb0487e14ead790fc81ca9fb2c99 (patch)
treee9170cf8e9e0c2820d97c9ed9a418189a1bdf9c3 /mm/process_vm_access.c
parent370b262c896e5565b271a3ea3abee4d0914ba443 (diff)
mm: add locked parameter to get_user_pages_remote()
Patch series "mm: unexport __get_user_pages_unlocked()". This patch series continues the cleanup of get_user_pages*() functions taking advantage of the fact we can now pass gup_flags as we please. It firstly adds an additional 'locked' parameter to get_user_pages_remote() to allow for its callers to utilise VM_FAULT_RETRY functionality. This is necessary as the invocation of __get_user_pages_unlocked() in process_vm_rw_single_vec() makes use of this and no other existing higher level function would allow it to do so. Secondly existing callers of __get_user_pages_unlocked() are replaced with the appropriate higher-level replacement - get_user_pages_unlocked() if the current task and memory descriptor are referenced, or get_user_pages_remote() if other task/memory descriptors are referenced (having acquiring mmap_sem.) This patch (of 2): Add a int *locked parameter to get_user_pages_remote() to allow VM_FAULT_RETRY faulting behaviour similar to get_user_pages_[un]locked(). Taking into account the previous adjustments to get_user_pages*() functions allowing for the passing of gup_flags, we are now in a position where __get_user_pages_unlocked() need only be exported for his ability to allow VM_FAULT_RETRY behaviour, this adjustment allows us to subsequently unexport __get_user_pages_unlocked() as well as allowing for future flexibility in the use of get_user_pages_remote(). [ merge fix for get_user_pages_remote API change] Link: Link: Signed-off-by: Lorenzo Stoakes <> Acked-by: Michal Hocko <> Cc: Jan Kara <> Cc: Hugh Dickins <> Cc: Dave Hansen <> Cc: Rik van Riel <> Cc: Mel Gorman <> Cc: Paolo Bonzini <> Cc: Radim Krcmar <> Signed-off-by: Stephen Rothwell <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm/process_vm_access.c')
0 files changed, 0 insertions, 0 deletions