aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/mm/ioremap.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/mm/ioremap.c')
-rw-r--r--arch/x86/mm/ioremap.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 62773abdf08..aca924a30ee 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -87,6 +87,8 @@ bool __virt_addr_valid(unsigned long x)
return false;
if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
return false;
+ if (x >= FIXADDR_START)
+ return false;
return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
}
EXPORT_SYMBOL(__virt_addr_valid);
@@ -504,13 +506,19 @@ static inline pte_t * __init early_ioremap_pte(unsigned long addr)
return &bm_pte[pte_index(addr)];
}
+static unsigned long slot_virt[FIX_BTMAPS_SLOTS] __initdata;
+
void __init early_ioremap_init(void)
{
pmd_t *pmd;
+ int i;
if (early_ioremap_debug)
printk(KERN_INFO "early_ioremap_init()\n");
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
+ slot_virt[i] = fix_to_virt(FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*i);
+
pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
memset(bm_pte, 0, sizeof(bm_pte));
pmd_populate_kernel(&init_mm, pmd, bm_pte);
@@ -577,6 +585,7 @@ static inline void __init early_clear_fixmap(enum fixed_addresses idx)
static void __iomem *prev_map[FIX_BTMAPS_SLOTS] __initdata;
static unsigned long prev_size[FIX_BTMAPS_SLOTS] __initdata;
+
static int __init check_early_ioremap_leak(void)
{
int count = 0;
@@ -598,7 +607,8 @@ static int __init check_early_ioremap_leak(void)
}
late_initcall(check_early_ioremap_leak);
-static void __init __iomem *__early_ioremap(unsigned long phys_addr, unsigned long size, pgprot_t prot)
+static void __init __iomem *
+__early_ioremap(unsigned long phys_addr, unsigned long size, pgprot_t prot)
{
unsigned long offset, last_addr;
unsigned int nrpages;
@@ -664,9 +674,9 @@ static void __init __iomem *__early_ioremap(unsigned long phys_addr, unsigned lo
--nrpages;
}
if (early_ioremap_debug)
- printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
+ printk(KERN_CONT "%08lx + %08lx\n", offset, slot_virt[slot]);
- prev_map[slot] = (void __iomem *)(offset + fix_to_virt(idx0));
+ prev_map[slot] = (void __iomem *)(offset + slot_virt[slot]);
return prev_map[slot];
}
@@ -734,8 +744,3 @@ void __init early_iounmap(void __iomem *addr, unsigned long size)
}
prev_map[slot] = NULL;
}
-
-void __this_fixmap_does_not_exist(void)
-{
- WARN_ON(1);
-}