From: Ingo Molnar <mingo@elte.hu>
To: Daniel Walker <dwalker@mvista.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH -rt] update kmap_atomic on !HIGHMEM
Date: Wed, 27 Dec 2006 22:31:50 +0100 [thread overview]
Message-ID: <20061227213150.GA15638@elte.hu> (raw)
In-Reply-To: <20061227212555.GA14947@elte.hu>
plus on i386 the fix below is needed as well.
Ingo
---
include/asm-i386/highmem.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
Index: linux/include/asm-i386/highmem.h
===================================================================
--- linux.orig/include/asm-i386/highmem.h
+++ linux/include/asm-i386/highmem.h
@@ -81,9 +81,9 @@ struct page *__kmap_atomic_to_page(void
* on PREEMPT_RT kmap_atomic() is a wrapper that uses kmap():
*/
#ifdef CONFIG_PREEMPT_RT
-# define kmap_atomic(page, type) kmap(page)
-# define kmap_atomic_pfn(pfn, type) kmap(pfn_to_page(pfn))
-# define kunmap_atomic(kvaddr, type) kunmap_virt(kvaddr)
+# define kmap_atomic(page, type) ({ pagefault_disable(); kmap(page); })
+# define kmap_atomic_pfn(pfn, type) kmap_atomic(pfn_to_page(pfn), type)
+# define kunmap_atomic(kvaddr, type) do { pagefault_enable(); kunmap_virt(kvaddr); } while (0)
# define kmap_atomic_to_page(kvaddr) kmap_to_page(kvaddr)
#else
# define kmap_atomic(page, type) __kmap_atomic(page, type)
next prev parent reply other threads:[~2006-12-27 21:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-27 19:35 Daniel Walker
2006-12-27 20:54 ` Ingo Molnar
2006-12-27 21:04 ` Daniel Walker
2006-12-27 21:25 ` Ingo Molnar
2006-12-27 21:31 ` Ingo Molnar [this message]
2006-12-27 21:37 ` Daniel Walker
2006-12-27 21:41 ` Ingo Molnar
2006-12-27 21:36 ` Daniel Walker
2006-12-27 21:54 ` Daniel Walker
2006-12-28 0:05 ` Daniel Walker
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