WSL2-Linux-Kernel/security/tomoyo
Lorenzo Stoakes 5b56d49fc3 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().

[sfr@canb.auug.org.au: merge fix for get_user_pages_remote API change]
  Link: http://lkml.kernel.org/r/20161122210511.024ec341@canb.auug.org.au
Link: http://lkml.kernel.org/r/20161027095141.2569-2-lstoakes@gmail.com
Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-14 16:04:08 -08:00
..
policy tomoyo: Do not generate empty policy files 2015-04-07 21:27:45 +02:00
.gitignore tomoyo: Do not generate empty policy files 2015-04-07 21:27:45 +02:00
Kconfig tomoyo: Use bin2c to generate builtin-policy.h 2015-04-07 21:27:45 +02:00
Makefile tomoyo: Do not generate empty policy files 2015-04-07 21:27:45 +02:00
audit.c tomoyo: Use sensible time interface 2014-06-12 16:18:45 +02:00
common.c tomoyo: Use sensible time interface 2014-06-12 16:18:45 +02:00
common.h tomoyo: constify assorted struct path * 2016-03-28 00:47:23 -04:00
condition.c VFS: security/: d_backing_inode() annotations 2015-04-15 15:06:56 -04:00
domain.c mm: add locked parameter to get_user_pages_remote() 2016-12-14 16:04:08 -08:00
environ.c TOMOYO: Add environment variable name restriction support. 2011-09-14 08:27:05 +10:00
file.c tomoyo: constify assorted struct path * 2016-03-28 00:47:23 -04:00
gc.c security: tomoyo: simplify the gc kthread creation 2016-06-06 20:23:55 +10:00
group.c TOMOYO: Add socket operation restriction support. 2011-09-14 08:27:05 +10:00
load_policy.c usermodehelper: use UMH_WAIT_PROC consistently 2012-03-23 16:58:41 -07:00
memory.c vfs: make the string hashes salt the hash 2016-06-10 20:21:46 -07:00
mount.c tomoyo: constify assorted struct path * 2016-03-28 00:47:23 -04:00
network.c TOMOYO: Add socket operation restriction support. 2011-09-14 08:27:05 +10:00
realpath.c fs: rename "rename2" i_op to "rename" 2016-09-27 11:03:58 +02:00
securityfs_if.c convert a bunch of open-coded instances of memdup_user_nul() 2016-01-04 10:26:58 -05:00
tomoyo.c constify security_sb_pivotroot() 2016-03-28 00:47:52 -04:00
util.c vfs: make the string hashes salt the hash 2016-06-10 20:21:46 -07:00