From: Steven Price <steven.price@arm.com>
To: linux-mm@kvack.org
Cc: "Mark Rutland" <Mark.Rutland@arm.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Will Deacon" <will.deacon@arm.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Liang, Kan" <kan.liang@linux.intel.com>,
linux-s390@vger.kernel.org, x86@kernel.org,
"Steven Price" <steven.price@arm.com>,
"Ingo Molnar" <mingo@redhat.com>, "Arnd Bergmann" <arnd@arndb.de>,
"Heiko Carstens" <heiko.carstens@de.ibm.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Andy Lutomirski" <luto@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
linux-kernel@vger.kernel.org, "James Morse" <james.morse@arm.com>,
"Martin Schwidefsky" <schwidefsky@de.ibm.com>
Subject: [PATCH v3 18/34] s390: mm: Add p?d_large() definitions
Date: Wed, 27 Feb 2019 17:05:52 +0000 [thread overview]
Message-ID: <20190227170608.27963-19-steven.price@arm.com> (raw)
In-Reply-To: <20190227170608.27963-1-steven.price@arm.com>
walk_page_range() is going to be allowed to walk page tables other than
those of user space. For this it needs to know when it has reached a
'leaf' entry in the page tables. This information is provided by the
p?d_large() functions/macros.
For s390, we don't support large pages, so add a stub returning 0.
CC: Martin Schwidefsky <schwidefsky@de.ibm.com>
CC: Heiko Carstens <heiko.carstens@de.ibm.com>
CC: linux-s390@vger.kernel.org
Signed-off-by: Steven Price <steven.price@arm.com>
---
arch/s390/include/asm/pgtable.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 063732414dfb..9617f1fb69b4 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -605,6 +605,11 @@ static inline int pgd_present(pgd_t pgd)
return (pgd_val(pgd) & _REGION_ENTRY_ORIGIN) != 0UL;
}
+static inline int pgd_large(pgd_t pgd)
+{
+ return 0;
+}
+
static inline int pgd_none(pgd_t pgd)
{
if (pgd_folded(pgd))
@@ -645,6 +650,11 @@ static inline int p4d_present(p4d_t p4d)
return (p4d_val(p4d) & _REGION_ENTRY_ORIGIN) != 0UL;
}
+static inline int p4d_large(p4d_t p4d)
+{
+ return 0;
+}
+
static inline int p4d_none(p4d_t p4d)
{
if (p4d_folded(p4d))
--
2.20.1
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next parent reply other threads:[~2019-02-27 17:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190227170608.27963-1-steven.price@arm.com>
2019-02-27 17:05 ` Steven Price [this message]
2019-02-27 17:40 ` [PATCH v3 18/34] s390: mm: Add p?d_large() definitions Martin Schwidefsky
2019-02-28 11:43 ` Steven Price
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