From: Peter Zijlstra <peterz@infradead.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Mike Frysinger <vapier.adi@gmail.com>,
Shan Hai <haishan.bai@gmail.com>,
paulus@samba.org, tglx@linutronix.de, walken@google.com,
dhowells@redhat.com, cmetcalf@tilera.com, tony.luck@intel.com,
akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org,
uclinux-dist-devel@blackfin.uclinux.org
Subject: Re: [RFC/PATCH] mm/futex: Fix futex writes on archs with SW tracking of dirty & young
Date: Wed, 27 Jul 2011 10:59:50 +0200 [thread overview]
Message-ID: <1311757190.24752.406.camel@twins> (raw)
In-Reply-To: <1311753513.25044.663.camel@pasglop>
On Wed, 2011-07-27 at 17:58 +1000, Benjamin Herrenschmidt wrote:
> What should nommu do anyways ? it's not like there's much it can do
> right ? It should never even hit the fault path to start with ...
Something like the below makes a nommu arm config build.. David, is this
indeed the correct thing to do for nommu?
---
Index: linux-2.6/mm/nommu.c
===================================================================
--- linux-2.6.orig/mm/nommu.c
+++ linux-2.6/mm/nommu.c
@@ -190,6 +190,12 @@ int get_user_pages(struct task_struct *t
}
EXPORT_SYMBOL(get_user_pages);
+int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
+ unsigned long address, unsigned int fault_flags)
+{
+ BUG(); /* nommu should never call this */
+}
+
/**
* follow_pfn - look up PFN at a user virtual address
* @vma: memory mapping
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: tony.luck@intel.com, Mike Frysinger <vapier.adi@gmail.com>,
Shan Hai <haishan.bai@gmail.com>,
linux-kernel@vger.kernel.org, cmetcalf@tilera.com,
dhowells@redhat.com, paulus@samba.org,
uclinux-dist-devel@blackfin.uclinux.org, tglx@linutronix.de,
walken@google.com, linuxppc-dev@lists.ozlabs.org,
akpm@linux-foundation.org
Subject: Re: [RFC/PATCH] mm/futex: Fix futex writes on archs with SW tracking of dirty & young
Date: Wed, 27 Jul 2011 10:59:50 +0200 [thread overview]
Message-ID: <1311757190.24752.406.camel@twins> (raw)
In-Reply-To: <1311753513.25044.663.camel@pasglop>
On Wed, 2011-07-27 at 17:58 +1000, Benjamin Herrenschmidt wrote:
> What should nommu do anyways ? it's not like there's much it can do
> right ? It should never even hit the fault path to start with ...
Something like the below makes a nommu arm config build.. David, is this
indeed the correct thing to do for nommu?
---
Index: linux-2.6/mm/nommu.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- linux-2.6.orig/mm/nommu.c
+++ linux-2.6/mm/nommu.c
@@ -190,6 +190,12 @@ int get_user_pages(struct task_struct *t
}
EXPORT_SYMBOL(get_user_pages);
=20
+int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
+ unsigned long address, unsigned int fault_flags)
+{
+ BUG(); /* nommu should never call this */
+}
+
/**
* follow_pfn - look up PFN at a user virtual address
* @vma: memory mapping
next prev parent reply other threads:[~2011-07-27 9:00 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-15 8:07 [PATCH 0/1] Fixup write permission of TLB on powerpc e500 core Shan Hai
2011-07-15 8:07 ` Shan Hai
2011-07-15 8:07 ` [PATCH 1/1] " Shan Hai
2011-07-15 8:07 ` Shan Hai
2011-07-15 10:23 ` Peter Zijlstra
2011-07-15 10:23 ` Peter Zijlstra
2011-07-15 15:18 ` Shan Hai
2011-07-15 15:18 ` Shan Hai
2011-07-15 15:24 ` Peter Zijlstra
2011-07-15 15:24 ` Peter Zijlstra
2011-07-16 15:36 ` Shan Hai
2011-07-16 15:36 ` Shan Hai
2011-07-16 14:50 ` Shan Hai
2011-07-16 14:50 ` Shan Hai
2011-07-16 23:49 ` Benjamin Herrenschmidt
2011-07-16 23:49 ` Benjamin Herrenschmidt
2011-07-17 9:38 ` Peter Zijlstra
2011-07-17 9:38 ` Peter Zijlstra
2011-07-17 14:29 ` Benjamin Herrenschmidt
2011-07-17 14:29 ` Benjamin Herrenschmidt
2011-07-17 23:14 ` Benjamin Herrenschmidt
2011-07-17 23:14 ` Benjamin Herrenschmidt
2011-07-18 3:53 ` Benjamin Herrenschmidt
2011-07-18 3:53 ` Benjamin Herrenschmidt
2011-07-18 4:02 ` Benjamin Herrenschmidt
2011-07-18 4:02 ` Benjamin Herrenschmidt
2011-07-18 4:01 ` Benjamin Herrenschmidt
2011-07-18 4:01 ` Benjamin Herrenschmidt
2011-07-18 6:48 ` Shan Hai
2011-07-18 6:48 ` Shan Hai
2011-07-18 7:01 ` Benjamin Herrenschmidt
2011-07-18 7:01 ` Benjamin Herrenschmidt
2011-07-18 7:26 ` Shan Hai
2011-07-18 7:26 ` Shan Hai
2011-07-18 7:36 ` Benjamin Herrenschmidt
2011-07-18 7:36 ` Benjamin Herrenschmidt
2011-07-18 7:50 ` Shan Hai
2011-07-18 7:50 ` Shan Hai
2011-07-19 3:30 ` Shan Hai
2011-07-19 3:30 ` Shan Hai
2011-07-19 4:20 ` Benjamin Herrenschmidt
2011-07-19 4:20 ` Benjamin Herrenschmidt
2011-07-19 4:29 ` [RFC/PATCH] mm/futex: Fix futex writes on archs with SW tracking of dirty & young Benjamin Herrenschmidt
2011-07-19 4:29 ` Benjamin Herrenschmidt
2011-07-19 4:55 ` Shan Hai
2011-07-19 4:55 ` Shan Hai
2011-07-19 5:17 ` Shan Hai
2011-07-19 5:17 ` Shan Hai
2011-07-19 5:24 ` Benjamin Herrenschmidt
2011-07-19 5:24 ` Benjamin Herrenschmidt
2011-07-19 5:38 ` Shan Hai
2011-07-19 5:38 ` Shan Hai
2011-07-19 7:46 ` Benjamin Herrenschmidt
2011-07-19 7:46 ` Benjamin Herrenschmidt
2011-07-19 8:24 ` Shan Hai
2011-07-19 8:24 ` Shan Hai
2011-07-19 8:26 ` [RFC/PATCH] mm/futex: Fix futex writes on archs with SW trackingof " David Laight
2011-07-19 8:26 ` David Laight
2011-07-19 8:45 ` Benjamin Herrenschmidt
2011-07-19 8:45 ` Benjamin Herrenschmidt
2011-07-19 8:45 ` Shan Hai
2011-07-19 8:45 ` Shan Hai
2011-07-19 11:10 ` [RFC/PATCH] mm/futex: Fix futex writes on archs with SW tracking of " Peter Zijlstra
2011-07-19 11:10 ` Peter Zijlstra
2011-07-20 14:39 ` Darren Hart
2011-07-20 14:39 ` Darren Hart
2011-07-21 22:36 ` Andrew Morton
2011-07-21 22:36 ` Andrew Morton
2011-07-21 22:52 ` Benjamin Herrenschmidt
2011-07-21 22:52 ` Benjamin Herrenschmidt
2011-07-21 22:57 ` Benjamin Herrenschmidt
2011-07-21 22:57 ` Benjamin Herrenschmidt
2011-07-21 22:59 ` Andrew Morton
2011-07-21 22:59 ` Andrew Morton
2011-07-22 1:40 ` Benjamin Herrenschmidt
2011-07-22 1:40 ` Benjamin Herrenschmidt
2011-07-22 1:54 ` Shan Hai
2011-07-22 1:54 ` Shan Hai
2011-07-27 6:50 ` Mike Frysinger
2011-07-27 6:50 ` Mike Frysinger
2011-07-27 7:58 ` Benjamin Herrenschmidt
2011-07-27 7:58 ` Benjamin Herrenschmidt
2011-07-27 8:59 ` Peter Zijlstra [this message]
2011-07-27 8:59 ` Peter Zijlstra
2011-07-27 10:09 ` David Howells
2011-07-27 10:09 ` David Howells
2011-07-27 10:17 ` Peter Zijlstra
2011-07-27 10:17 ` Peter Zijlstra
2011-07-27 10:20 ` Benjamin Herrenschmidt
2011-07-27 10:20 ` Benjamin Herrenschmidt
2011-07-28 0:12 ` Mike Frysinger
2011-07-28 0:12 ` Mike Frysinger
2011-08-08 2:31 ` Mike Frysinger
2011-08-08 2:31 ` Mike Frysinger
2011-07-28 10:55 ` David Howells
2011-07-28 10:55 ` David Howells
2011-07-17 11:02 ` [PATCH 1/1] Fixup write permission of TLB on powerpc e500 core Peter Zijlstra
2011-07-17 11:02 ` Peter Zijlstra
2011-07-17 13:33 ` Shan Hai
2011-07-17 13:33 ` Shan Hai
2011-07-17 14:48 ` Benjamin Herrenschmidt
2011-07-17 14:48 ` Benjamin Herrenschmidt
2011-07-17 15:40 ` Shan Hai
2011-07-17 15:40 ` Shan Hai
2011-07-17 22:34 ` Benjamin Herrenschmidt
2011-07-17 22:34 ` Benjamin Herrenschmidt
2011-07-17 14:34 ` Benjamin Herrenschmidt
2011-07-17 14:34 ` Benjamin Herrenschmidt
2011-07-15 8:20 ` [PATCH 0/1] " Peter Zijlstra
2011-07-15 8:20 ` Peter Zijlstra
2011-07-15 8:38 ` MailingLists
2011-07-15 8:38 ` MailingLists
2011-07-15 8:44 ` Peter Zijlstra
2011-07-15 8:44 ` Peter Zijlstra
2011-07-15 9:08 ` Shan Hai
2011-07-15 9:08 ` Shan Hai
2011-07-15 9:12 ` Benjamin Herrenschmidt
2011-07-15 9:12 ` Benjamin Herrenschmidt
2011-07-15 9:50 ` Peter Zijlstra
2011-07-15 9:50 ` Peter Zijlstra
2011-07-15 10:06 ` Shan Hai
2011-07-15 10:06 ` Shan Hai
2011-07-15 10:32 ` David Laight
2011-07-15 10:32 ` David Laight
2011-07-15 10:39 ` Peter Zijlstra
2011-07-15 10:39 ` Peter Zijlstra
2011-07-15 15:32 ` Shan Hai
2011-07-15 15:32 ` Shan Hai
2011-07-16 0:20 ` Benjamin Herrenschmidt
2011-07-16 0:20 ` Benjamin Herrenschmidt
2011-07-16 15:03 ` Shan Hai
2011-07-16 15:03 ` Shan Hai
2011-07-15 23:47 ` Benjamin Herrenschmidt
2011-07-15 23:47 ` Benjamin Herrenschmidt
2011-07-15 9:07 ` Benjamin Herrenschmidt
2011-07-15 9:07 ` Benjamin Herrenschmidt
2011-07-15 9:05 ` Benjamin Herrenschmidt
2011-07-15 9:05 ` Benjamin Herrenschmidt
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