Commit 8c20fafa authored Jan 25, 2006 by Michael Ellerman Committed by Paul Mackerras Feb 07, 2006

[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>

parent fa938953

arch/powerpc/mm/lmb.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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)