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[PATCH] powerpc: Make sure we don't create empty lmb regions 

To prevent problems later in boot, make sure we don't create zero-size lmb
regions.

I've checked all the callers, and at the moment no one should ever hit this.
All callers use a constant size, or they check the computed size before they
call us.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman 2006-01-25 21:31:26 +13:00 committed by Paul Mackerras
parent fa93895329
commit 8c20fafa85
1 changed files with 4 additions and 0 deletions
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4
arch/powerpc/mm/lmb.c
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@ -197,6 +197,8 @@ long __init lmb_reserve(unsigned long base, unsigned long size)
{
struct lmb_region *_rgn = &(lmb.reserved);
BUG_ON(0 == size);
return lmb_add_region(_rgn, base, size);
}
@ -227,6 +229,8 @@ unsigned long __init lmb_alloc_base(unsigned long size, unsigned long align,
long i, j;
unsigned long base = 0;
BUG_ON(0 == size);
#ifdef CONFIG_PPC32
/* On 32-bit, make sure we allocate lowmem */
if (max_addr == LMB_ALLOC_ANYWHERE)