Commit-ID: 57f01796f14fecf00d330fe39c8d2477ced9cd79
Gitweb: https://git.kernel.org/tip/57f01796f14fecf00d330fe39c8d2477ced9cd79
Author: Michael Kelley <[email protected]>
AuthorDate: Thu, 1 Nov 2018 00:35:05 +0000
Committer: Thomas Gleixner <[email protected]>
CommitDate: Thu, 1 Nov 2018 10:00:38 +0100
irq/matrix: Fix memory overallocation
IRQ_MATRIX_SIZE is the number of longs needed for a bitmap, multiplied by
the size of a long, yielding a byte count. But it is used to size an array
of longs, which is way more memory than is needed.
Change IRQ_MATRIX_SIZE so it is just the number of longs needed and the
arrays come out the correct size.
Fixes: 2f75d9e1c905 ("genirq: Implement bitmap matrix allocator")
Signed-off-by: Michael Kelley <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: KY Srinivasan <[email protected]>
Link:
https://lkml.kernel.org/r/[email protected]
---
kernel/irq/matrix.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 6e6d467f3dec..1f0985adf193 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -8,7 +8,7 @@
#include <linux/cpu.h>
#include <linux/irq.h>
-#define IRQ_MATRIX_SIZE (BITS_TO_LONGS(IRQ_MATRIX_BITS) *
sizeof(unsigned long))
+#define IRQ_MATRIX_SIZE (BITS_TO_LONGS(IRQ_MATRIX_BITS))
struct cpumap {
unsigned int available;
