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From: Hillf Danton <hdanton@sina.com>
To: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: "Stefano Stabellini <sstabellini@kernel.org>" <sstabellini@kernel.org>
Subject: [patch 2/2] xen/arm: Use p2m entry with lock protection
Date: Tue, 30 Apr 2019 13:37:35 +0800	[thread overview]
Message-ID: <E1hLLTC-0002do-79@lists.xenproject.org> (raw)


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A new local variable is introduced for accessing p2m entry with lock protection.

Cc: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Hillf Danton <hdanton@sina.com>
---

--- a/arch/arm/xen/p2m.c	2019-04-30 12:32:05.363768200 +0800
+++ b/arch/arm/xen/p2m.c	2019-04-30 12:58:19.854334100 +0800
@@ -70,8 +70,9 @@ unsigned long __pfn_to_mfn(unsigned long
		entry = rb_entry(n, struct xen_p2m_entry, rbnode_phys);
		if (entry->pfn <= pfn &&
				entry->pfn + entry->nr_pages > pfn) {
+			unsigned long mfn = entry->mfn + (pfn - entry->pfn);
			read_unlock_irqrestore(&p2m_lock, irqflags);
-			return entry->mfn + (pfn - entry->pfn);
+			return mfn;
		}
		if (pfn < entry->pfn)
			n = n->rb_left;
--


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WARNING: multiple messages have this Message-ID (diff)
From: Hillf Danton <hdanton@sina.com>
To: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: "Stefano Stabellini <sstabellini@kernel.org>" <sstabellini@kernel.org>
Subject: [Xen-devel] [patch 2/2] xen/arm: Use p2m entry with lock protection
Date: Tue, 30 Apr 2019 13:37:35 +0800	[thread overview]
Message-ID: <E1hLLTC-0002do-79@lists.xenproject.org> (raw)
Message-ID: <20190430053735.y9dTBjJF2cty8GvYhwLkBARmkXg-a902sCMPhQMkeoE@z> (raw)


[-- Attachment #1.1: Type: text/plain, Size: 727 bytes --]

A new local variable is introduced for accessing p2m entry with lock protection.

Cc: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Hillf Danton <hdanton@sina.com>
---

--- a/arch/arm/xen/p2m.c	2019-04-30 12:32:05.363768200 +0800
+++ b/arch/arm/xen/p2m.c	2019-04-30 12:58:19.854334100 +0800
@@ -70,8 +70,9 @@ unsigned long __pfn_to_mfn(unsigned long
		entry = rb_entry(n, struct xen_p2m_entry, rbnode_phys);
		if (entry->pfn <= pfn &&
				entry->pfn + entry->nr_pages > pfn) {
+			unsigned long mfn = entry->mfn + (pfn - entry->pfn);
			read_unlock_irqrestore(&p2m_lock, irqflags);
-			return entry->mfn + (pfn - entry->pfn);
+			return mfn;
		}
		if (pfn < entry->pfn)
			n = n->rb_left;
--


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[-- Attachment #2: Type: text/plain, Size: 157 bytes --]

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel

             reply	other threads:[~2019-04-30  5:38 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-30  5:37 Hillf Danton [this message]
2019-04-30  5:37 ` [Xen-devel] [patch 2/2] xen/arm: Use p2m entry with lock protection Hillf Danton
     [not found] <20190430053741.F1C0C2080C@mail.kernel.org>
2019-04-30 16:21 ` Stefano Stabellini
2019-04-30 19:56   ` Stefano Stabellini

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