Displaying 6 results from an estimated 6 matches for "copy_user_highpage".
2019 Mar 12
0
[RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap()
...an already lost cause.
In lots of cases kmap is needed to just modify kernel memory not to
modify userland memory (where get/put_user is more commonly used
instead..), there's no cache aliasing in such case.
> Actually copy_user_page() is unused in the main kernel. The big
> problem is copy_user_highpage() but that's mostly highly optimised by
> the VIPT architectures (in other words you can fiddle with kmap without
> impacting it).
copy_user_page is not unused, it's called precisely by
copy_user_highpage, which is why the cache flushes are done inside
copy_user_page.
static inline...
2008 Oct 27
0
[PATCH 4/4] linux/i386: utilize hypervisor highmem handling helpers
...id clear_highpage(struct page *);
+static inline void clear_user_highpage(struct page *page, unsigned long vaddr)
+{
+ clear_highpage(page);
+}
+#define __HAVE_ARCH_CLEAR_HIGHPAGE
+#define __HAVE_ARCH_CLEAR_USER_HIGHPAGE
+
+void copy_highpage(struct page *to, struct page *from);
+static inline void copy_user_highpage(struct page *to, struct page *from,
+ unsigned long vaddr, struct vm_area_struct *vma)
+{
+ copy_highpage(to, from);
+}
+#define __HAVE_ARCH_COPY_HIGHPAGE
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+
#endif /* __KERNEL__ */
#endif /* _ASM_HIGHMEM_H */
Index: head-2008-10-24/include/linux/highmem.h...
2019 Mar 12
9
[RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap()
On Tue, Mar 12, 2019 at 10:59:09AM +0800, Jason Wang wrote:
>
> On 2019/3/12 ??2:14, David Miller wrote:
> > From: "Michael S. Tsirkin" <mst at redhat.com>
> > Date: Mon, 11 Mar 2019 09:59:28 -0400
> >
> > > On Mon, Mar 11, 2019 at 03:13:17PM +0800, Jason Wang wrote:
> > > > On 2019/3/8 ??10:12, Christoph Hellwig wrote:
> > >
2019 Mar 12
9
[RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap()
On Tue, Mar 12, 2019 at 10:59:09AM +0800, Jason Wang wrote:
>
> On 2019/3/12 ??2:14, David Miller wrote:
> > From: "Michael S. Tsirkin" <mst at redhat.com>
> > Date: Mon, 11 Mar 2019 09:59:28 -0400
> >
> > > On Mon, Mar 11, 2019 at 03:13:17PM +0800, Jason Wang wrote:
> > > > On 2019/3/8 ??10:12, Christoph Hellwig wrote:
> > >
2004 Apr 30
2
Can not compile zaptel at SuSE 9.0
...undeclared
identifier is reported only once
/usr/src/linux/include/linux/highmem.h:93: error: for each function it
appears in.)
/usr/src/linux/include/linux/highmem.h:132:41: macro "copy_user_page"
requires 4 arguments, but only 3 given
/usr/src/linux/include/linux/highmem.h: In function `copy_user_highpage':
/usr/src/linux/include/linux/highmem.h:132: error: `copy_user_page'
undeclared (first use in this function)
In file included from /usr/include/linux/dma-mapping.h:13,
from /usr/include/asm-generic/pci-dma-compat.h:7,
from /usr/include/asm/pci.h:92,...
2004 Jul 19
0
Cant compile Zaptel at all
...undeclared identifier is reported only once
/usr/src/linux/include/linux/highmem.h:87: error: for each function it appears in.)
/usr/src/linux/include/linux/highmem.h:119:41: macro "copy_user_page" requires 4 arguments, but only 3 given
/usr/src/linux/include/linux/highmem.h: In function `copy_user_highpage':
/usr/src/linux/include/linux/highmem.h:119: error: `copy_user_page' undeclared (first use in this function)
In file included from /usr/include/linux/dma-mapping.h:13,
from /usr/include/asm-generic/pci-dma-compat.h:7,
from /usr/include/asm/pci.h:92,...