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| author | Will Deacon <will.deacon@arm.com> | 2017-10-24 11:22:47 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-25 14:26:21 +0100 |
| commit | 1aedecaf12a67de999eaf233cdb64839170ca035 (patch) | |
| tree | a48c562615d314dcc63173cf55876df6b7ff444f /fs/dcache.c | |
| parent | 065060cdd3de1f7a1f08284999081c4c38601ef7 (diff) | |
locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()
commit c2bc66082e1048c7573d72e62f597bdc5ce13fea upstream.
[ Note, this is a Git cherry-pick of the following commit:
76ebbe78f739 ("locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()")
... for easier x86 PTI code testing and back-porting. ]
In preparation for the removal of lockless_dereference(), which is the
same as READ_ONCE() on all architectures other than Alpha, add an
implicit smp_read_barrier_depends() to READ_ONCE() so that it can be
used to head dependency chains on all architectures.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1508840570-22169-3-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/dcache.c')
0 files changed, 0 insertions, 0 deletions