[patch 163/262] xen/x86: free_p2m_page: use memblock_free_ptr() to free a virtual pointer

Andrew Morton
2021-11-05T20:44:13Z

From: Mike Rapoport <rppt@linux.ibm.com>
Subject: xen/x86: free_p2m_page: use memblock_free_ptr() to free a virtual pointer

free_p2m_page() wrongly passes a virtual pointer to memblock_free() that
treats it as a physical address.

Call memblock_free_ptr() instead that gets a virtual address to free the
memory.

Link: https://lkml.kernel.org/r/20210930185031.18648-3-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Shahab Vahedi <Shahab.Vahedi@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

arch/x86/xen/p2m.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/xen/p2m.c~xen-x86-free_p2m_page-use-memblock_free_ptr-to-free-a-virtual-pointer
+++ a/arch/x86/xen/p2m.c
@@ -197,7 +197,7 @@ static void * __ref alloc_p2m_page(void)
static void __ref free_p2m_page(void *p)
{
if (unlikely(!slab_is_available())) {
- memblock_free((unsigned long)p, PAGE_SIZE);
+ memblock_free_ptr(p, PAGE_SIZE);
return;
}

_