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Prevent long type overflow of realmem calculation on ILP32 by forcing

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calculation to be in quad_t space.  Fix style issue with second parameter
to qmin().

Reported by:	alc
Reviewed by:	bde, alc
This commit is contained in:
Andre Oppermann 2012-12-10 12:19:03 +00:00
parent 1a006f7d56
commit 0060bab556
1 changed files with 2 additions and 2 deletions
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4
sys/kern/subr_param.c
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@ -332,8 +332,8 @@ init_param2(long physpages)
* available kernel memory (physical or kmem).
* At most it can be 3/4 of available kernel memory.
*/
realmem = qmin(physpages * PAGE_SIZE,
VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS);
realmem = qmin((quad_t)physpages * PAGE_SIZE,
VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS);
maxmbufmem = realmem / 2;
TUNABLE_QUAD_FETCH("kern.maxmbufmem", &maxmbufmem);
if (maxmbufmem > (realmem / 4) * 3)