linux-kernel - [PATCH 2/3] xen/x86: free_p2m_page: use memblock_free

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Date:   Thu, 23 Sep 2021 10:43:34 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        devicetree@...r.kernel.org, iommu@...ts.linux-foundation.org,
        kasan-dev@...glegroups.com, kvm@...r.kernel.org,
        linux-alpha@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-mm@...ck.org,
        linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-sh@...r.kernel.org, linux-snps-arc@...ts.infradead.org,
        linux-um@...ts.infradead.org, linux-usb@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org,
        xen-devel@...ts.xenproject.org, Mike Rapoport <rppt@...ux.ibm.com>
Subject: [PATCH 2/3] xen/x86: free_p2m_page: use memblock_free_ptr() to free a virtual pointer

From: Mike Rapoport <rppt@...ux.ibm.com>

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.

Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
---
 arch/x86/xen/p2m.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 5e6e236977c7..141bb9dbd2fb 100644
--- a/arch/x86/xen/p2m.c
+++ b/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;
 	}
 
-- 
2.28.0