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VMCI: Fixup atomic64_t abuse
authorPeter Zijlstra <peterz@infradead.org>
Thu, 6 Jun 2019 09:34:28 +0000 (11:34 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 6 Jun 2019 15:51:18 +0000 (17:51 +0200)
commit9c3cef54c50d93871eaa46c28a06de8bd03fab63
treec10452a54d1c57feae1fa9c2ab1ec31f96fbdce4tree
parentd0a178095c5fbbd25454c20e49bc3a7d70ecb769commit | diff
VMCI: Fixup atomic64_t abuse

The VMCI driver is abusing atomic64_t and atomic_t, there is no actual
atomic RmW operations around.

Rewrite the code to use a regular u64 with READ_ONCE() and
WRITE_ONCE() and a cast to 'unsigned long'. This fully preserves
whatever broken there was (it's not endian-safe for starters, and also
looks to be missing ordering).

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
include/linux/vmw_vmci_defs.h diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)