From: Joerg Roedel <joro@8bytes.org>
To: Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Joerg Roedel <jroedel@suse.de>
Subject: [PATCH 1/3] x86/mm: Check for pfn instead of page in vmalloc_sync_one()
Date: Wed, 17 Jul 2019 09:14:37 +0200 [thread overview]
Message-ID: <20190717071439.14261-2-joro@8bytes.org> (raw)
In-Reply-To: <20190717071439.14261-1-joro@8bytes.org>
From: Joerg Roedel <jroedel@suse.de>
Do not require a struct page for the mapped memory location
because it might not exist. This can happen when an
ioremapped region is mapped with 2MB pages.
Fixes: 5d72b4fba40ef ('x86, mm: support huge I/O mapping capability I/F')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
arch/x86/mm/fault.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 794f364cb882..4a4049f6d458 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -200,7 +200,7 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
if (!pmd_present(*pmd))
set_pmd(pmd, *pmd_k);
else
- BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
+ BUG_ON(pmd_pfn(*pmd) != pmd_pfn(*pmd_k));
return pmd_k;
}
--
2.17.1
next prev parent reply other threads:[~2019-07-17 7:15 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-17 7:14 [PATCH 0/3 v2] Sync unmappings in vmalloc/ioremap areas Joerg Roedel
2019-07-17 7:14 ` Joerg Roedel [this message]
2019-07-17 7:14 ` [PATCH 2/3] x86/mm: Sync also unmappings in vmalloc_sync_one() Joerg Roedel
2019-07-17 21:06 ` Dave Hansen
2019-07-18 8:44 ` Joerg Roedel
2019-07-17 21:43 ` Thomas Gleixner
2019-07-18 8:46 ` Joerg Roedel
2019-07-18 9:04 ` Thomas Gleixner
2019-07-18 9:25 ` Joerg Roedel
2019-07-19 14:01 ` Joerg Roedel
2019-07-19 21:10 ` Thomas Gleixner
2019-07-17 7:14 ` [PATCH 3/3] mm/vmalloc: Sync unmappings in vunmap_page_range() Joerg Roedel
2019-07-17 21:24 ` Andy Lutomirski
2019-07-18 9:17 ` Joerg Roedel
2019-07-18 19:04 ` Andy Lutomirski
2019-07-19 12:21 ` Joerg Roedel
2019-07-19 12:24 ` Andy Lutomirski
2019-07-19 13:00 ` Joerg Roedel
-- strict thread matches above, loose matches on Subject: below --
2019-08-13 15:28 [PATCH 0/3 5.2-stable] Sync mappings in vmalloc/ioremap areas Joerg Roedel
2019-08-13 15:28 ` [PATCH 1/3] x86/mm: Check for pfn instead of page in vmalloc_sync_one() Joerg Roedel
2019-08-13 15:28 [PATCH 0/3 4.19-stable] Sync mappings in vmalloc/ioremap areas Joerg Roedel
2019-08-13 15:28 ` [PATCH 1/3] x86/mm: Check for pfn instead of page in vmalloc_sync_one() Joerg Roedel
2019-07-19 18:46 [PATCH 0/3 v3] Sync unmappings in vmalloc/ioremap areas Joerg Roedel
2019-07-19 18:46 ` [PATCH 1/3] x86/mm: Check for pfn instead of page in vmalloc_sync_one() Joerg Roedel
2019-07-15 11:02 [PATCH 0/3] Sync unmappings in vmalloc/ioremap areas Joerg Roedel
2019-07-15 11:02 ` [PATCH 1/3] x86/mm: Check for pfn instead of page in vmalloc_sync_one() Joerg Roedel
2019-07-15 13:08 ` Thomas Gleixner
2019-07-15 15:44 ` Joerg Roedel
2019-07-15 18:48 ` Thomas Gleixner
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