This removes implicit default actions in map_generic_kernel() call.
Also changes comments in vmalloc.h
Signed-Off-By: KAMEZAWA Hiroyuki <[email protected]>
Index: devel-2.6.19/include/linux/vmalloc.h
===================================================================
--- devel-2.6.19.orig/include/linux/vmalloc.h 2006-12-08 15:02:39.000000000 +0900
+++ devel-2.6.19/include/linux/vmalloc.h 2006-12-09 13:46:17.000000000 +0900
@@ -81,6 +81,9 @@
* not managed by standard vmap calls.
* The caller has to be responsible to manage his own virtual address space.
*
+ * what you have to do in pud/pmd/pte allocation is allocate page and
+ * populate that entry.
+ *
* Bootstrap consideration:
* you can pass pud/pmd/pte alloc functions to map_generic_kernel().
* So you can use bootmem function or something to alloc page tables if
@@ -88,13 +91,12 @@
*/
struct gen_map_kern_ops {
- /* must be defined */
+ /* all pointers must be filled */
int (*k_pte_set)(pte_t *pte, unsigned long addr, void *data);
- int (*k_pte_clear)(pte_t *pte, unsigned long addr, void *data);
- /* optional */
int (*k_pud_alloc)(pgd_t *pgd, unsigned long addr, void *data);
int (*k_pmd_alloc)(pud_t *pud, unsigned long addr, void *data);
int (*k_pte_alloc)(pmd_t *pmd, unsigned long addr, void *data);
+ int (*k_pte_clear)(pte_t *pte, unsigned long addr, void *data);
};
/*
Index: devel-2.6.19/mm/vmalloc.c
===================================================================
--- devel-2.6.19.orig/mm/vmalloc.c 2006-12-08 15:02:39.000000000 +0900
+++ devel-2.6.19/mm/vmalloc.c 2006-12-09 13:44:35.000000000 +0900
@@ -764,15 +764,10 @@
int ret = 0;
unsigned long next;
if (!pmd_present(*pmd)) {
- if (ops->k_pte_alloc) {
- ret = ops->k_pte_alloc(pmd, addr, data);
- if (ret)
- return ret;
- } else {
- pte = pte_alloc_kernel(pmd, addr);
- if (!pte)
- return -ENOMEM;
- }
+ BUG_ON(!ops->k_pte_alloc);
+ ret = ops->k_pte_alloc(pmd, addr, data);
+ if (ret)
+ return ret;
}
pte = pte_offset_kernel(pmd, addr);
@@ -796,15 +791,10 @@
int ret;
if (pud_none(*pud)) {
- if (ops->k_pmd_alloc) {
- ret = ops->k_pmd_alloc(pud, addr, data);
- if (ret)
- return ret;
- } else {
- pmd = pmd_alloc(&init_mm, pud, addr);
- if (!pmd)
- return -ENOMEM;
- }
+ BUG_ON(!ops->k_pmd_alloc);
+ ret = ops->k_pmd_alloc(pud, addr, data);
+ if (ret)
+ return ret;
}
pmd = pmd_offset(pud, addr);
do {
@@ -824,15 +814,10 @@
unsigned long next;
int ret;
if (pgd_none(*pgd)) {
- if (ops->k_pud_alloc) {
- ret = ops->k_pud_alloc(pgd, addr, data);
- if (ret)
- return ret;
- } else {
- pud = pud_alloc(&init_mm, pgd, addr);
- if (!pud)
- return -ENOMEM;
- }
+ BUG_ON(!ops->k_pud_alloc);
+ ret = ops->k_pud_alloc(pgd, addr, data);
+ if (ret)
+ return ret;
}
pud = pud_offset(pgd, addr);
do {
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
