linux-master/mm/highmem.c

34 static inline int kmap_local_calc_idx(int idx)
36 	return idx + KM_MAX_IDX * smp_processor_id();
40 #define arch_kmap_local_map_idx(idx, pfn)	kmap_local_calc_idx(idx)
169 		for (i = 0; i < kctrl->idx; i++) {
171 			int idx;
173 			idx = arch_kmap_local_map_idx(i, pte_pfn(pteval));
174 			base_addr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
467 	current->kmap_ctrl.idx += KM_INCR;
468 	BUG_ON(current->kmap_ctrl.idx >= KM_MAX_IDX);
469 	return current->kmap_ctrl.idx - 1;
474 	return current->kmap_ctrl.idx - 1;
479 	current->kmap_ctrl.idx -= KM_INCR;
480 	BUG_ON(current->kmap_ctrl.idx < 0);
496 #define arch_kmap_local_unmap_idx(idx, vaddr)	kmap_local_calc_idx(idx)
525 static pte_t *kmap_get_pte(unsigned long vaddr, int idx)
529 		 * Set by the arch if __kmap_pte[-idx] does not produce
535 	return &__kmap_pte[-idx];
542 	int idx;
550 	idx = arch_kmap_local_map_idx(kmap_local_idx_push(), pfn);
551 	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
552 	kmap_pte = kmap_get_pte(vaddr, idx);
589 	int idx;
610 	idx = arch_kmap_local_unmap_idx(kmap_local_idx(), addr);
611 	WARN_ON_ONCE(addr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
613 	kmap_pte = kmap_get_pte(addr, idx);
627  * the task::kmap_ctrl.idx is not modified by the unmapping code so a
641 	for (i = 0; i < tsk->kmap_ctrl.idx; i++) {
644 		int idx;
661 		idx = arch_kmap_local_map_idx(i, pte_pfn(pteval));
663 		addr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
664 		kmap_pte = kmap_get_pte(addr, idx);
678 	for (i = 0; i < tsk->kmap_ctrl.idx; i++) {
681 		int idx;
692 		idx = arch_kmap_local_map_idx(i, pte_pfn(pteval));
693 		addr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
694 		kmap_pte = kmap_get_pte(addr, idx);
702 	if (WARN_ON_ONCE(tsk->kmap_ctrl.idx))