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| author | Michael Kelley <mikelley@microsoft.com> | 2018-11-01 00:35:05 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-11-01 10:00:38 +0100 |
| commit | 57f01796f14fecf00d330fe39c8d2477ced9cd79 (patch) | |
| tree | 720d25c0f621a6422bd4be5af0a2c51d99b8091e /kernel | |
| parent | 5b7449810ae6d652629c550d3974c8453836d229 (diff) | |
| download | linux-57f01796f14fecf00d330fe39c8d2477ced9cd79.tar.gz linux-57f01796f14fecf00d330fe39c8d2477ced9cd79.tar.bz2 linux-57f01796f14fecf00d330fe39c8d2477ced9cd79.zip | |
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 <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
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 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; |