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| author | Zoltan Kiss <zoltan.kiss@citrix.com> | 2014-02-27 15:55:30 +0000 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2014-03-18 14:40:19 +0000 |
| commit | 1429d46df4c538d28460d0b493997006a62a1093 (patch) | |
| tree | 81e177be951fd3134d2e475307af278a1951061a /arch/x86/kernel/apic/probe_32.c | |
| parent | 395edbb80b049884df075be54ef46cc742c3e266 (diff) | |
xen/grant-table: Refactor gnttab_[un]map_refs to avoid m2p_override
The grant mapping API does m2p_override unnecessarily: only gntdev needs it,
for blkback and future netback patches it just cause a lock contention, as
those pages never go to userspace. Therefore this series does the following:
- the bulk of the original function (everything after the mapping hypercall)
is moved to arch-dependent set/clear_foreign_p2m_mapping
- the "if (xen_feature(XENFEAT_auto_translated_physmap))" branch goes to ARM
- therefore the ARM function could be much smaller, the m2p_override stubs
could be also removed
- on x86 the set_phys_to_machine calls were moved up to this new funcion
from m2p_override functions
- and m2p_override functions are only called when there is a kmap_ops param
It also removes a stray space from arch/x86/include/asm/xen/page.h.
Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Suggested-by: Anthony Liguori <aliguori@amazon.com>
Suggested-by: David Vrabel <david.vrabel@citrix.com>
Suggested-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'arch/x86/kernel/apic/probe_32.c')
0 files changed, 0 insertions, 0 deletions