#ifndef _ASM_ARM_XEN_PAGE_H
#define _ASM_ARM_XEN_PAGE_H

#include <asm/page.h>
#include <asm/pgtable.h>

#include <linux/pfn.h>
#include <linux/types.h>
#include <linux/dma-mapping.h>

#include <xen/xen.h>
#include <xen/interface/grant_table.h>

#define phys_to_machine_mapping_valid(pfn) (1)

/* Xen machine address */
typedef struct xmaddr {
	phys_addr_t maddr;
} xmaddr_t;

/* Xen pseudo-physical address */
typedef struct xpaddr {
	phys_addr_t paddr;
} xpaddr_t;

#define XMADDR(x)	((xmaddr_t) { .maddr = (x) })
#define XPADDR(x)	((xpaddr_t) { .paddr = (x) })

#define INVALID_P2M_ENTRY      (~0UL)

/*
 * The pseudo-physical frame (pfn) used in all the helpers is always based
 * on Xen page granularity (i.e 4KB).
 *
 * A Linux page may be split across multiple non-contiguous Xen page so we
 * have to keep track with frame based on 4KB page granularity.
 *
 * PV drivers should never make a direct usage of those helpers (particularly
 * pfn_to_gfn and gfn_to_pfn).
 */

unsigned long __pfn_to_mfn(unsigned long pfn);
extern struct rb_root phys_to_mach;

/* Pseudo-physical <-> Guest conversion */
static inline unsigned long pfn_to_gfn(unsigned long pfn)
{
	return pfn;
}

static inline unsigned long gfn_to_pfn(unsigned long gfn)
{
	return gfn;
}

/* Pseudo-physical <-> BUS conversion */
static inline unsigned long pfn_to_bfn(unsigned long pfn)
{
	unsigned long mfn;

	if (phys_to_mach.rb_node != NULL) {
		mfn = __pfn_to_mfn(pfn);
		if (mfn != INVALID_P2M_ENTRY)
			return mfn;
	}

	return pfn;
}

static inline unsigned long bfn_to_pfn(unsigned long bfn)
{
	return bfn;
}

#define bfn_to_local_pfn(bfn)	bfn_to_pfn(bfn)

/* VIRT <-> GUEST conversion */
#define virt_to_gfn(v)		(pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT))
#define gfn_to_virt(m)		(__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT))

/* Only used in PV code. But ARM guests are always HVM. */
static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
{
	BUG();
}

/* TODO: this shouldn't be here but it is because the frontend drivers
 * are using it (its rolled in headers) even though we won't hit the code path.
 * So for right now just punt with this.
 */
static inline pte_t *lookup_address(unsigned long address, unsigned int *level)
{
	BUG();
	return NULL;
}

extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
				   struct gnttab_map_grant_ref *kmap_ops,
				   struct page **pages, unsigned int count);

extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
				     struct gnttab_unmap_grant_ref *kunmap_ops,
				     struct page **pages, unsigned int count);

bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
		unsigned long nr_pages);

static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
{
	return __set_phys_to_machine(pfn, mfn);
}

#define xen_remap(cookie, size) ioremap_cache((cookie), (size))
#define xen_unmap(cookie) iounmap((cookie))

bool xen_arch_need_swiotlb(struct device *dev,
			   phys_addr_t phys,
			   dma_addr_t dev_addr);
unsigned long xen_get_swiotlb_free_pages(unsigned int order);

#endif /* _ASM_ARM_XEN_PAGE_H */
n' name='id' value='3277953de2f31dd03c6375e9a9f680ac37fc9d27'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>zhong jiang &lt;zhongjiang@huawei.com&gt;</td><td class='right'>2017-01-24 15:18:52 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-24 16:26:14 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/atm/Kconfig?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>3277953de2f31dd03c6375e9a9f680ac37fc9d27</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/atm/Kconfig?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>6ba22924faa1b82ef2f0277db10a3f5abdc44157</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/atm/Kconfig?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>net/atm/Kconfig</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/atm/Kconfig?id=3705ccfdd1e8b539225ce20e3925a945cc788d67'>3705ccfdd1e8b539225ce20e3925a945cc788d67</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/atm/Kconfig?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27&amp;id2=3705ccfdd1e8b539225ce20e3925a945cc788d67'>diff</a>)</td></tr></table>
<div class='commit-subject'>mm: do not export ioremap_page_range symbol for external module</div><div class='commit-msg'>Recently, I've found cases in which ioremap_page_range was used
incorrectly, in external modules, leading to crashes.  This can be
partly attributed to the fact that ioremap_page_range is lower-level,
with fewer protections, as compared to the other functions that an
external module would typically call.  Those include:

     ioremap_cache
     ioremap_nocache
     ioremap_prot
     ioremap_uc
     ioremap_wc
     ioremap_wt

...each of which wraps __ioremap_caller, which in turn provides a safer
way to achieve the mapping.

Therefore, stop EXPORT-ing ioremap_page_range.

Link: http://lkml.kernel.org/r/1485173220-29010-1-git-send-email-zhongjiang@huawei.com
Signed-off-by: zhong jiang &lt;zhongjiang@huawei.com&gt;
Reviewed-by: John Hubbard &lt;jhubbard@nvidia.com&gt;
Suggested-by: John Hubbard &lt;jhubbard@nvidia.com&gt;
Acked-by: Michal Hocko &lt;mhocko@suse.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>Diffstat</a> (limited to 'net/atm/Kconfig')</div><table summary='diffstat' class='diffstat'>