From bb5c43428252f27b875c764451321a83a531d6e5 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 28 Nov 2017 15:40:33 +0100
Subject: [PATCH] genirq/matrix: Fix the precedence fix for real
The previous commit which made the operator precedence in
irq_matrix_available() explicit made the implicit brokenness explicitely
wrong. It was wrong in the original commit already. The overworked
maintainer did not notice it either when merging the patch.
Replace the confusing '?' construct by a simple and obvious if ().
Fixes: 75f1133873d6 ("genirq/matrix: Make - vs ?: Precedence explicit")
Reported-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kees Cook <keescook@chromium.org>
---
kernel/irq/matrix.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 7df2480005f86..0ba0dd8863a77 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -384,7 +384,9 @@ unsigned int irq_matrix_available(struct irq_matrix *m, bool cpudown)
{
struct cpumap *cm = this_cpu_ptr(m->maps);
- return (m->global_available - cpudown) ? cm->available : 0;
+ if (!cpudown)
+ return m->global_available;
+ return m->global_available - cm->available;
}
/**
--
2.30.2