[LV-commit] CVS: kernel-2.5/include/asm-vax/mm pagelet_pgd.h,1.4,1.5

[Kenn H. <ke...@us...>]

Update of /cvsroot/linux-vax/kernel-2.5/include/asm-vax/mm
In directory sc8-pr-cvs1:/tmp/cvs-serv23951

Modified Files:
	pagelet_pgd.h 
Log Message:
Remove unnecessary __pgd_offset() macro.

Add documentation comments for pgd_index and pgd_offset_k (copied from
i386 in 2.5.66)


Index: pagelet_pgd.h
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.5/include/asm-vax/mm/pagelet_pgd.h,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- pagelet_pgd.h	2 Dec 2002 01:08:08 -0000	1.4
+++ pagelet_pgd.h	26 Aug 2003 23:12:14 -0000	1.5
@@ -62,11 +62,18 @@
 /* to find an entry in a page-table-directory */
 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
 
-/* to find an entry in a kernel page-table-directory */
-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
-
-/* to find an entry in a page-table-directory */
+/*
+ * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
+ *
+ * this macro returns the index of the entry in the pgd page which would
+ * control the given virtual address
+ */
 #define pgd_index(address)     ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
-#define __pgd_offset(address)  pgd_index(address)
+
+/*
+ * a shortcut which implies the use of the kernel's pgd, instead
+ * of a process's
+ */
+#define pgd_offset_k(address) pgd_offset(&init_mm, address)
 
 #endif