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Date: Tue, 5 Feb 2019 19:34:31 +0100 From: Denys Vlasenko <vda.linux@...glemail.com> To: Frederic Weisbecker <fweisbec@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: preempt.h: some SOFTIRQ_OFFSET should be SOFTIRQ_MASK? SOFTIRQ is a counter. Why here: #define in_serving_softirq() (softirq_count() & SOFTIRQ_OFFSET) #define in_task() (!(preempt_count() & \ (NMI_MASK | HARDIRQ_MASK | SOFTIRQ_OFFSET))) we check only lowest bit?