From: Mike Rapoport <rppt@kernel.org>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>, Peter Xu <peterx@redhat.com>,
maobibo <maobibo@loongson.cn>,
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
linux-mips@vger.kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, Mike Rapoport <rppt@kernel.org>,
Mike Rapoport <rppt@linux.ibm.com>
Subject: [PATCH] mips: define pud_index() regardless of page table folding
Date: Thu, 2 Apr 2020 11:16:14 +0300 [thread overview]
Message-ID: <20200402081614.5696-1-rppt@kernel.org> (raw)
From: Mike Rapoport <rppt@linux.ibm.com>
Commit 31168f033e37 ("mips: drop __pXd_offset() macros that duplicate
pXd_index() ones") is correct that pud_index() & __pud_offset() are the
same when pud_index() is actually provided, however it does not take into
account the __PAGETABLE_PUD_FOLDED case. This has broken MIPS KVM
compilation because it relied on availability of pud_index().
Define pud_index() regardless of page table folded. It will evaluate to
actual index for 4-level pagetables and to 0 for folded PUD level.
Link: https://lore.kernel.org/lkml/20200331154749.5457-1-pbonzini@redhat.com
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
arch/mips/include/asm/pgtable-64.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h
index f92716cfa4f4..ee5dc0c145b9 100644
--- a/arch/mips/include/asm/pgtable-64.h
+++ b/arch/mips/include/asm/pgtable-64.h
@@ -172,6 +172,8 @@
extern pte_t invalid_pte_table[PTRS_PER_PTE];
+#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
+
#ifndef __PAGETABLE_PUD_FOLDED
/*
* For 4-level pagetables we defines these ourselves, for 3-level the
@@ -210,8 +212,6 @@ static inline void p4d_clear(p4d_t *p4dp)
p4d_val(*p4dp) = (unsigned long)invalid_pud_table;
}
-#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
-
static inline unsigned long p4d_page_vaddr(p4d_t p4d)
{
return p4d_val(p4d);
--
2.25.1
next reply other threads:[~2020-04-02 8:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-02 8:16 Mike Rapoport [this message]
2020-04-13 6:21 ` [PATCH] mips: define pud_index() regardless of page table folding Huacai Chen
2020-04-15 6:43 ` Philippe Mathieu-Daudé
2020-04-16 16:35 ` Thomas Bogendoerfer
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