diff mbox series

[2/4] mm/highmem: Prepare for overriding set_pte_at()

Message ID 20210112170411.056306194@linutronix.de (mailing list archive)
State New, archived
Headers show
Series mm/highmem: Fix fallout from generic kmap_local conversions | expand

Commit Message

Thomas Gleixner Jan. 12, 2021, 5:01 p.m. UTC 
The generic kmap_local() map function uses set_pte_at(), but MIPS requires
set_pte() and PowerPC wants __set_pte_at().

Provide arch_kmap_local_set_pte() and default it to set_pte_at().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 mm/highmem.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -473,6 +473,11 @@  static inline void *arch_kmap_local_high
 }
 #endif
 
+#ifndef arch_kmap_local_set_pte
+#define arch_kmap_local_set_pte(mm, vaddr, ptep, ptev)	\
+	set_pte_at(mm, vaddr, ptep, ptev)
+#endif
+
 /* Unmap a local mapping which was obtained by kmap_high_get() */
 static inline bool kmap_high_unmap_local(unsigned long vaddr)
 {
@@ -515,7 +520,7 @@  void *__kmap_local_pfn_prot(unsigned lon
 	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 	BUG_ON(!pte_none(*(kmap_pte - idx)));
 	pteval = pfn_pte(pfn, prot);
-	set_pte_at(&init_mm, vaddr, kmap_pte - idx, pteval);
+	arch_kmap_local_set_pte(&init_mm, vaddr, kmap_pte - idx, pteval);
 	arch_kmap_local_post_map(vaddr, pteval);
 	current->kmap_ctrl.pteval[kmap_local_idx()] = pteval;
 	preempt_enable();