__stop___ex_table = .;
}
- RODATA
-
BUG_TABLE
. = ALIGN(4);
__tracedata_end = .;
}
+ RODATA
+
/* writeable */
. = ALIGN(4096);
.data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */
#include <linux/init.h>
#include <linux/highmem.h>
#include <linux/pagemap.h>
+#include <linux/pfn.h>
#include <linux/poison.h>
#include <linux/bootmem.h>
#include <linux/slab.h>
void mark_rodata_ro(void)
{
- unsigned long addr = (unsigned long)__start_rodata;
+ unsigned long start = PFN_ALIGN(_text);
+ unsigned long size = PFN_ALIGN(_etext) - start;
- for (; addr < (unsigned long)__end_rodata; addr += PAGE_SIZE)
- change_page_attr(virt_to_page(addr), 1, PAGE_KERNEL_RO);
+#ifdef CONFIG_HOTPLUG_CPU
+ /* It must still be possible to apply SMP alternatives. */
+ if (num_possible_cpus() <= 1)
+#endif
+ {
+ change_page_attr(virt_to_page(start),
+ size >> PAGE_SHIFT, PAGE_KERNEL_RX);
+ printk("Write protecting the kernel text: %luk\n", size >> 10);
+ }
- printk("Write protecting the kernel read-only data: %uk\n",
- (__end_rodata - __start_rodata) >> 10);
+ start += size;
+ size = (unsigned long)__end_rodata - start;
+ change_page_attr(virt_to_page(start),
+ size >> PAGE_SHIFT, PAGE_KERNEL_RO);
+ printk("Write protecting the kernel read-only data: %luk\n",
+ size >> 10);
/*
* change_page_attr() requires a global_flush_tlb() call after it.
__free_page(page);
totalram_pages++;
}
- printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
+ printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
}
void free_initmem(void)
.balign PAGE_SIZE
ENTRY(stext)
-ENTRY(_stext)
#define NEXT_PAGE(name) \
.balign PAGE_SIZE; \
.text : AT(ADDR(.text) - LOAD_OFFSET) {
/* First the code that has to be first for bootstrapping */
*(.bootstrap.text)
+ _stext = .;
/* Then all the functions that are "hot" in profiles, to group them
onto the same hugetlb entry */
#include "functionlist"
__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
__stop___ex_table = .;
- RODATA
-
BUG_TABLE
+ RODATA
+
. = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
/* Data */
.data : AT(ADDR(.data) - LOAD_OFFSET) {
#include <linux/bootmem.h>
#include <linux/proc_fs.h>
#include <linux/pci.h>
+#include <linux/pfn.h>
#include <linux/poison.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
if (begin >= end)
return;
- printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
+ printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
for (addr = begin; addr < end; addr += PAGE_SIZE) {
struct page *page = pfn_to_page(addr >> PAGE_SHIFT);
ClearPageReserved(page);
init_page_count(page);
memset(page_address(page), POISON_FREE_INITMEM, PAGE_SIZE);
+ if (addr >= __START_KERNEL_map)
+ change_page_attr_addr(addr, 1, __pgprot(0));
__free_page(page);
totalram_pages++;
}
+ if (addr > __START_KERNEL_map)
+ global_flush_tlb();
}
void free_initmem(void)
{
- memset(__initdata_begin, POISON_FREE_INITDATA,
- __initdata_end - __initdata_begin);
free_init_pages("unused kernel memory",
__pa_symbol(&__init_begin),
__pa_symbol(&__init_end));
void mark_rodata_ro(void)
{
- unsigned long addr = (unsigned long)__va(__pa_symbol(&__start_rodata));
- unsigned long end = (unsigned long)__va(__pa_symbol(&__end_rodata));
+ unsigned long start = PFN_ALIGN(__va(__pa_symbol(&_stext))), size;
- for (; addr < end; addr += PAGE_SIZE)
- change_page_attr_addr(addr, 1, PAGE_KERNEL_RO);
+#ifdef CONFIG_HOTPLUG_CPU
+ /* It must still be possible to apply SMP alternatives. */
+ if (num_possible_cpus() > 1)
+ start = PFN_ALIGN(__va(__pa_symbol(&_etext)));
+#endif
+ size = (unsigned long)__va(__pa_symbol(&__end_rodata)) - start;
+ change_page_attr_addr(start, size >> PAGE_SHIFT, PAGE_KERNEL_RO);
- printk ("Write protecting the kernel read-only data: %luk\n",
- (__end_rodata - __start_rodata) >> 10);
+ printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
+ size >> 10);
/*
* change_page_attr_addr() requires a global_flush_tlb() call after it.
/********** arch/$ARCH/mm/init.c **********/
#define POISON_FREE_INITMEM 0xcc
-/********** arch/x86_64/mm/init.c **********/
-#define POISON_FREE_INITDATA 0xba
-
/********** arch/ia64/hp/common/sba_iommu.c **********/
/*
* arch/ia64/hp/common/sba_iommu.c uses a 16-byte poison string with a