rcu: Avoid ->dynticks_nmi_nesting store tearing

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NMIs can nest, and store tearing could in theory happen on carries
from one byte to the next.  This commit therefore adds the WRITE_ONCE()
macros preventing this.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Paul E. McKenney 2017-10-02 16:54:49 -07:00

parent 4fbd8d194f

commit 2e672ab2d4

1 changed files with 5 additions and 3 deletions

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kernel/rcu/tree.c

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