linux-kernel - [PATCH 5.12 312/384] powerpc/kvm: Fix build error when PPC_MEM_KEYS/PPC

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Date:   Mon, 10 May 2021 12:21:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: [PATCH 5.12 312/384] powerpc/kvm: Fix build error when PPC_MEM_KEYS/PPC_PSERIES=n

From: Michael Ellerman <mpe@...erman.id.au>

commit ee1bc694fbaec1a662770703fc34a74abf418938 upstream.

lkp reported a randconfig failure:

     In file included from arch/powerpc/include/asm/book3s/64/pkeys.h:6,
                    from arch/powerpc/kvm/book3s_64_mmu_host.c:15:
     arch/powerpc/include/asm/book3s/64/hash-pkey.h: In function 'hash__vmflag_to_pte_pkey_bits':
  >> arch/powerpc/include/asm/book3s/64/hash-pkey.h:10:23: error: 'VM_PKEY_BIT0' undeclared
        10 |  return (((vm_flags & VM_PKEY_BIT0) ? H_PTE_PKEY_BIT0 : 0x0UL) |
         |                       ^~~~~~~~~~~~

We added the include of book3s/64/pkeys.h for pte_to_hpte_pkey_bits(),
but that header on its own should only be included when PPC_MEM_KEYS=y.
Instead include linux/pkeys.h, which brings in the right definitions
when PPC_MEM_KEYS=y and also provides empty stubs when PPC_MEM_KEYS=n.

Fixes: e4e8bc1df691 ("powerpc/kvm: Fix PR KVM with KUAP/MEM_KEYS enabled")
Cc: stable@...r.kernel.org # v5.11+
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Link: https://lore.kernel.org/r/20210425115831.2818434-1-mpe@ellerman.id.au
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/powerpc/kvm/book3s_64_mmu_host.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/kvm/book3s_64_mmu_host.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_host.c
@@ -8,11 +8,11 @@
  */
 
 #include <linux/kvm_host.h>
+#include <linux/pkeys.h>
 
 #include <asm/kvm_ppc.h>
 #include <asm/kvm_book3s.h>
 #include <asm/book3s/64/mmu-hash.h>
-#include <asm/book3s/64/pkeys.h>
 #include <asm/machdep.h>
 #include <asm/mmu_context.h>
 #include <asm/hw_irq.h>