[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>
diff --git a/arch/powerpc/mm/lmb.c b/arch/powerpc/mm/lmb.c
index 9584608..bbe3eac 100644
--- a/arch/powerpc/mm/lmb.c
+++ b/arch/powerpc/mm/lmb.c
@@ -197,6 +197,8 @@
{
struct lmb_region *_rgn = &(lmb.reserved);
+ BUG_ON(0 == size);
+
return lmb_add_region(_rgn, base, size);
}
@@ -227,6 +229,8 @@
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)