renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-21 03:33:59 +08:00
Code

[IA64] ioremap() should prefer WB over UC

Browse Source 
efi_memmap_init() collects full granules of WB memory, without
regard for whether they also support UC.  So in order for ioremap()
to work for main memory, it must prefer WB mappings when possible.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Bjorn Helgaas 2006-03-30 09:53:39 -07:00 committed by Tony Luck
parent 3283a67d86
commit c1c57d7671
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/ia64/mm/ioremap.c
View File

@ -21,12 +21,12 @@ __ioremap (unsigned long offset, unsigned long size)
void __iomem *
ioremap (unsigned long offset, unsigned long size)
{
if (efi_mem_attribute_range(offset, size, EFI_MEMORY_UC))
return __ioremap(offset, size);
if (efi_mem_attribute_range(offset, size, EFI_MEMORY_WB))
return phys_to_virt(offset);
if (efi_mem_attribute_range(offset, size, EFI_MEMORY_UC))
return __ioremap(offset, size);
/*
* Someday this should check ACPI resources so we
* can do the right thing for hot-plugged regions.