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xen: fix allocation and use of large ldts, cleanup 

Add a proper comment for set_aliased_prot() and fix an
unsigned long/void * warning.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-07-28 13:33:44 -07:00 committed by Ingo Molnar
parent 4b336b0625
commit cef43bf6b3
1 changed files with 5 additions and 4 deletions
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9
arch/x86/xen/enlighten.c
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@ -237,8 +237,10 @@ static unsigned long xen_store_tr(void)
}
/*
* If 'v' is a vmalloc mapping, then find the linear mapping of the
* page (if any) and also set its protections to match:
* Set the page permissions for a particular virtual address. If the
* address is a vmalloc mapping (or other non-linear mapping), then
* find the linear mapping of the page and also set its protections to
* match.
*/
static void set_aliased_prot(void *v, pgprot_t prot)
{
@ -387,8 +389,7 @@ static void xen_load_gs_index(unsigned int idx)
static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
const void *ptr)
{
unsigned long lp = (unsigned long)&dt[entrynum];
xmaddr_t mach_lp = arbitrary_virt_to_machine(lp);
xmaddr_t mach_lp = arbitrary_virt_to_machine(&dt[entrynum]);
u64 entry = *(u64 *)ptr;
preempt_disable();