From: Huacai Chen <chenhc@lemote.com>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: John Crispin <john@phrozen.org>,
"Steven J . Hill" <Steven.Hill@imgtec.com>,
linux-mips@linux-mips.org, Fuxin Zhang <zhangfx@lemote.com>,
Zhangjin Wu <wuzhangjin@gmail.com>,
Huacai Chen <chenhc@lemote.com>,
stable@vger.kernel.org
Subject: [PATCH RESEND 4/4] MIPS: Ensure pmd_present() returns false after pmd_mknotpresent()
Date: Sat, 21 Jan 2017 08:56:06 +0800 [thread overview]
Message-ID: <1484960166-30022-4-git-send-email-chenhc@lemote.com> (raw)
In-Reply-To: <1484960166-30022-1-git-send-email-chenhc@lemote.com>
This patch is borrowed from ARM64 to ensure pmd_present() returns false
after pmd_mknotpresent(). This is needed for THP.
Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhc@lemote.com>
---
arch/mips/include/asm/pgtable-64.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h
index 514cbc0..ef6f007 100644
--- a/arch/mips/include/asm/pgtable-64.h
+++ b/arch/mips/include/asm/pgtable-64.h
@@ -193,6 +193,11 @@ static inline int pmd_bad(pmd_t pmd)
static inline int pmd_present(pmd_t pmd)
{
+#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
+ if (unlikely(pmd_val(pmd) & _PAGE_HUGE))
+ return pmd_val(pmd) & _PAGE_PRESENT;
+#endif
+
return pmd_val(pmd) != (unsigned long) invalid_pte_table;
}
--
2.7.0
prev parent reply other threads:[~2017-01-21 0:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-21 0:56 [PATCH RESEND 1/4] MIPS: Add MIPS_CPU_FTLB for Loongson-3A R2 Huacai Chen
2017-01-21 0:56 ` [PATCH RESEND 2/4] MIPS: Check TLB before handle_ri_rdhwr() for Loongson-3 Huacai Chen
2017-01-21 0:56 ` [PATCH RESEND 3/4] MIPS: Flush wrong invalid FTLB entry for huge page Huacai Chen
2017-01-21 0:56 ` Huacai Chen [this message]
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