diff options
| author | Michael Kelley <mikelley@microsoft.com> | 2018-11-01 00:35:05 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-01 09:17:13 +0100 |
| commit | 0bbb8382db4c8c7d1b0dc894f3364719d91dbf7e (patch) | |
| tree | 8eb70ce2ce2afe81071da652d62a36defee80fac /kernel | |
| parent | ad8298fccd706b6c5fd23c20c77a1d38ecb34609 (diff) | |
irq/matrix: Fix memory overallocation
[ Upstream commit 57f01796f14fecf00d330fe39c8d2477ced9cd79 ]
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 <mikelley@microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: KY Srinivasan <kys@microsoft.com>
Link: https://lkml.kernel.org/r/1541032428-10392-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/matrix.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c index 92337703ca9f..30cc217b8631 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; |