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m32r: Should index be positive?

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Index `ipi_num' is signed, test whether it is negative to
make sure we don't get a negative array element.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
This commit is contained in:
Roel Kluin 2009-11-01 15:33:06 +01:00 committed by Hirokazu Takata
parent 337214e8c6
commit 45cdd47330
1 changed files with 1 additions and 1 deletions
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2
arch/m32r/kernel/smp.c
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@ -806,7 +806,7 @@ unsigned long send_IPI_mask_phys(cpumask_t physid_mask, int ipi_num,
if (mask & ~physids_coerce(phys_cpu_present_map))
BUG();
if (ipi_num >= NR_IPIS)
if (ipi_num >= NR_IPIS || ipi_num < 0)
BUG();
mask <<= IPI_SHIFT;