mm/frontswap.c: use non-atomic '__set_bit()' when possible
The 'a' and 'b' bitmaps are local to this function, so no concurrent access can occur. So the non-atomic '__set_bit()' can be used to save a few cycles. Link: https://lkml.kernel.org/r/e52476da5cee57151745c5c3c934a69798dc6fa4.1638132190.git.christophe.jaillet@wanadoo.fr Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -127,7 +127,7 @@ void frontswap_register_ops(struct frontswap_ops *ops)
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spin_lock(&swap_lock);
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plist_for_each_entry(si, &swap_active_head, list) {
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if (!WARN_ON(!si->frontswap_map))
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set_bit(si->type, a);
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__set_bit(si->type, a);
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}
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spin_unlock(&swap_lock);
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@ -149,7 +149,7 @@ void frontswap_register_ops(struct frontswap_ops *ops)
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spin_lock(&swap_lock);
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plist_for_each_entry(si, &swap_active_head, list) {
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if (si->frontswap_map)
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set_bit(si->type, b);
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__set_bit(si->type, b);
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}
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spin_unlock(&swap_lock);
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