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authorPeter Zijlstra <peterz@infradead.org>2020-02-19 09:46:47 +0100
committerThomas Gleixner <tglx@linutronix.de>2020-05-19 15:51:17 +0200
commit69ea03b56ed2c7189ccd0b5910ad39f3cad1df21 (patch)
treef5070915d8d90d28e70b6a467db88c69a73d803e /include/linux/preempt.h
parent28f6bf9e247fe23d177cfdbf7e709270e8cc7fa6 (diff)
hardirq/nmi: Allow nested nmi_enter()
Since there are already a number of sites (ARM64, PowerPC) that effectively nest nmi_enter(), make the primitive support this before adding even more. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Marc Zyngier <maz@kernel.org> Acked-by: Will Deacon <will@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Link: https://lkml.kernel.org/r/20200505134100.864179229@linutronix.de
Diffstat (limited to 'include/linux/preempt.h')
-rw-r--r--include/linux/preempt.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/preempt.h b/include/linux/preempt.h
index bc3f1aecaa19..7d9c1c0e149c 100644
--- a/include/linux/preempt.h
+++ b/include/linux/preempt.h
@@ -26,13 +26,13 @@
* PREEMPT_MASK: 0x000000ff
* SOFTIRQ_MASK: 0x0000ff00
* HARDIRQ_MASK: 0x000f0000
- * NMI_MASK: 0x00100000
+ * NMI_MASK: 0x00f00000
* PREEMPT_NEED_RESCHED: 0x80000000
*/
#define PREEMPT_BITS 8
#define SOFTIRQ_BITS 8
#define HARDIRQ_BITS 4
-#define NMI_BITS 1
+#define NMI_BITS 4
#define PREEMPT_SHIFT 0
#define SOFTIRQ_SHIFT (PREEMPT_SHIFT + PREEMPT_BITS)