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Commit 93ea02bb8435 ("arch: Clean up asm/barrier.h implementations") wired generic barrier.h for ARC, but failed to delete the existing file. In 3.15, due to rcupdate.h updates, this causes a build breakage on ARC: CC arch/arc/kernel/asm-offsets.s In file included from include/linux/sched.h:45:0, from arch/arc/kernel/asm-offsets.c:9: include/linux/rculist.h: In function __list_add_rcu: include/linux/rculist.h:54:2: error: implicit declaration of function smp_store_release [-Werror=implicit-function-declaration] rcu_assign_pointer(list_next_rcu(prev), new); ^ Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>