#include <asm/pgalloc.h>
#include <asm/mmu.h>
-static int handle_vmalloc_fault(unsigned long address)
+/*
+ * kernel virtual address is required to implement vmalloc/pkmap/fixmap
+ * Refer to asm/processor.h for System Memory Map
+ *
+ * It simply copies the PMD entry (pointer to 2nd level page table or hugepage)
+ * from swapper pgdir to task pgdir. The 2nd level table/page is thus shared
+ */
+noinline static int handle_kernel_vaddr_fault(unsigned long address)
{
/*
* Synchronize this task's top level page-table
* only copy the information from the master page table,
* nothing more.
*/
- if (address >= VMALLOC_START && address <= VMALLOC_END) {
- ret = handle_vmalloc_fault(address);
+ if (address >= VMALLOC_START) {
+ ret = handle_kernel_vaddr_fault(address);
if (unlikely(ret))
goto bad_area_nosemaphore;
else