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>
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@ -237,8 +237,10 @@ static unsigned long xen_store_tr(void)
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}
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/*
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* If 'v' is a vmalloc mapping, then find the linear mapping of the
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* page (if any) and also set its protections to match:
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* Set the page permissions for a particular virtual address. If the
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* address is a vmalloc mapping (or other non-linear mapping), then
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* find the linear mapping of the page and also set its protections to
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* match.
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*/
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static void set_aliased_prot(void *v, pgprot_t prot)
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{
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@ -387,8 +389,7 @@ static void xen_load_gs_index(unsigned int idx)
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static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
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const void *ptr)
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{
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unsigned long lp = (unsigned long)&dt[entrynum];
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xmaddr_t mach_lp = arbitrary_virt_to_machine(lp);
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xmaddr_t mach_lp = arbitrary_virt_to_machine(&dt[entrynum]);
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u64 entry = *(u64 *)ptr;
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preempt_disable();
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