mirror of
https://github.com/torvalds/linux.git
synced 2024-11-11 22:51:42 +00:00
x86-32: use specific __vmalloc_start_set flag in __virt_addr_valid
Rather than relying on the ever-unreliable system_state, add a specific __vmalloc_start_set flag to indicate whether the vmalloc area has meaningful boundaries yet, and use that in x86-32's __phys_addr and __virt_addr_valid. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
a964e33c5d
commit
dc16ecf7fd
@ -25,6 +25,11 @@
|
||||
* area for the same reason. ;)
|
||||
*/
|
||||
#define VMALLOC_OFFSET (8 * 1024 * 1024)
|
||||
|
||||
#ifndef __ASSEMBLER__
|
||||
extern bool __vmalloc_start_set; /* set once high_memory is set */
|
||||
#endif
|
||||
|
||||
#define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET)
|
||||
#ifdef CONFIG_X86_PAE
|
||||
#define LAST_PKMAP 512
|
||||
|
@ -59,6 +59,8 @@ unsigned long highstart_pfn, highend_pfn;
|
||||
|
||||
static noinline int do_test_wp_bit(void);
|
||||
|
||||
bool __read_mostly __vmalloc_start_set = false;
|
||||
|
||||
static __init void *alloc_low_page(void)
|
||||
{
|
||||
unsigned long pfn = e820_table_end++;
|
||||
@ -757,6 +759,8 @@ void __init initmem_init(unsigned long start_pfn,
|
||||
#ifdef CONFIG_FLATMEM
|
||||
max_mapnr = num_physpages;
|
||||
#endif
|
||||
__vmalloc_start_set = true;
|
||||
|
||||
printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
|
||||
pages_to_mb(max_low_pfn));
|
||||
|
||||
|
@ -76,10 +76,9 @@ static inline int phys_addr_valid(unsigned long addr)
|
||||
#ifdef CONFIG_DEBUG_VIRTUAL
|
||||
unsigned long __phys_addr(unsigned long x)
|
||||
{
|
||||
/* VMALLOC_* aren't constants; not available at the boot time */
|
||||
/* VMALLOC_* aren't constants */
|
||||
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
|
||||
VIRTUAL_BUG_ON(system_state != SYSTEM_BOOTING &&
|
||||
is_vmalloc_addr((void *) x));
|
||||
VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
|
||||
return x - PAGE_OFFSET;
|
||||
}
|
||||
EXPORT_SYMBOL(__phys_addr);
|
||||
@ -89,7 +88,7 @@ bool __virt_addr_valid(unsigned long x)
|
||||
{
|
||||
if (x < PAGE_OFFSET)
|
||||
return false;
|
||||
if (system_state != SYSTEM_BOOTING && is_vmalloc_addr((void *) x))
|
||||
if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
|
||||
return false;
|
||||
return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user