Merge branch 'for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu (55db91fb) · Commits · 戴 / test

Pull percpu update from Dennis Zhou: "Michael Cree noted generic UP Alpha has been broken since v3.18. This is a small fix for locking in UP percpu code that fixes the issue" * 'for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu: percpu: convert spin_lock_irq to spin_lock_irqsave.

mm/percpu-km.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -50,6 +50,7 @@ static struct pcpu_chunk *pcpu_create_chunk(gfp_t gfp)
		const int nr_pages = pcpu_group_sizes[0] >> PAGE_SHIFT;
		struct pcpu_chunk *chunk;
		struct page *pages;
		unsigned long flags;
		int i;

		chunk = pcpu_alloc_chunk(gfp);
		@@ -68,9 +69,9 @@ static struct pcpu_chunk *pcpu_create_chunk(gfp_t gfp)
		chunk->data = pages;
		chunk->base_addr = page_address(pages) - pcpu_group_offsets[0];

		spin_lock_irq(&pcpu_lock);
		spin_lock_irqsave(&pcpu_lock, flags);
		pcpu_chunk_populated(chunk, 0, nr_pages, false);
		spin_unlock_irq(&pcpu_lock);
		spin_unlock_irqrestore(&pcpu_lock, flags);

		pcpu_stats_chunk_alloc();
		trace_percpu_create_chunk(chunk->base_addr);

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