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| author | Linus Walleij <[email protected]> | 2024-10-23 12:05:34 +0000 |
|---|---|---|
| committer | Russell King (Oracle) <[email protected]> | 2024-11-13 08:15:23 +0000 |
| commit | 93ee385254d53849c01dd8ab9bc9d02790ee7f0e (patch) | |
| tree | a7f915fc8ceae2a2c1c5f541995ef3d13dfff019 /drivers/platform/x86/intel/pmt/class.c | |
| parent | ARM: 9430/1: entry: Do a dummy read from VMAP shadow (diff) | |
| download | kernel-93ee385254d53849c01dd8ab9bc9d02790ee7f0e.tar.gz kernel-93ee385254d53849c01dd8ab9bc9d02790ee7f0e.zip | |
ARM: 9431/1: mm: Pair atomic_set_release() with _read_acquire()
The code for syncing vmalloc memory PGD pointers is using
atomic_read() in pair with atomic_set_release() but the
proper pairing is atomic_read_acquire() paired with
atomic_set_release().
This is done to clearly instruct the compiler to not
reorder the memcpy() or similar calls inside the section
so that we do not observe changes to init_mm. memcpy()
calls should be identified by the compiler as having
unpredictable side effects, but let's try to be on the
safe side.
Cc: [email protected]
Fixes: d31e23aff011 ("ARM: mm: make vmalloc_seq handling SMP safe")
Suggested-by: Mark Rutland <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King (Oracle) <[email protected]>
Diffstat (limited to 'drivers/platform/x86/intel/pmt/class.c')
0 files changed, 0 insertions, 0 deletions