From: Joerg Roedel <joro@8bytes.org>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Andy Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Juergen Gross <jgross@suse.com>,
Peter Zijlstra <peterz@infradead.org>,
Borislav Petkov <bp@alien8.de>, Jiri Kosina <jkosina@suse.cz>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Brian Gerst <brgerst@gmail.com>,
David Laight <David.Laight@aculab.com>,
Denys Vlasenko <dvlasenk@redhat.com>,
Eduardo Valentin <eduval@amazon.com>,
Greg KH <gregkh@linuxfoundation.org>,
Will Deacon <will.deacon@arm.com>,
aliguori@amazon.com, daniel.gruss@iaik.tugraz.at,
hughd@google.com, keescook@google.com,
Andrea Arcangeli <aarcange@redhat.com>,
Waiman Long <llong@redhat.com>, Pavel Machek <pavel@ucw.cz>,
"David H . Gutteridge" <dhgutteridge@sympatico.ca>,
jroedel@suse.de, Arnaldo Carvalho de Melo <acme@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
joro@8bytes.org
Subject: [PATCH 1/3] x86/mm: Remove in_nmi() warning from vmalloc_fault()
Date: Wed, 25 Jul 2018 17:48:01 +0200 [thread overview]
Message-ID: <1532533683-5988-2-git-send-email-joro@8bytes.org> (raw)
In-Reply-To: <1532533683-5988-1-git-send-email-joro@8bytes.org>
From: Joerg Roedel <jroedel@suse.de>
It is perfectly okay to take page-faults, especially on the
vmalloc area while executing an NMI handler. Remove the
warning.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
arch/x86/mm/fault.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 2aafa6a..db1c042 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -317,8 +317,6 @@ static noinline int vmalloc_fault(unsigned long address)
if (!(address >= VMALLOC_START && address < VMALLOC_END))
return -1;
- WARN_ON_ONCE(in_nmi());
-
/*
* Synchronize this task's top level page-table
* with the 'reference' page table.
--
2.7.4
next prev parent reply other threads:[~2018-07-25 15:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-25 15:48 [PATCH 0/3] PTI x86-32 Updates and Fixes Joerg Roedel
2018-07-25 15:48 ` Joerg Roedel [this message]
2018-07-30 11:57 ` [tip:x86/pti] x86/mm: Remove in_nmi() warning from vmalloc_fault() tip-bot for Joerg Roedel
2018-07-25 15:48 ` [PATCH 2/3] Revert "perf/core: Make sure the ring-buffer is mapped in all page-tables" Joerg Roedel
2018-07-30 11:58 ` [tip:x86/pti] " tip-bot for Joerg Roedel
2018-07-25 15:48 ` [PATCH 3/3] x86/kexec: Allocate 8k PGDs for PTI Joerg Roedel
2018-07-30 11:58 ` [tip:x86/pti] " tip-bot for Joerg Roedel
2018-07-30 7:08 ` [PATCH 0/3] PTI x86-32 Updates and Fixes David H. Gutteridge
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