lkml.org 
[lkml]   [2012]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/7] x86, mm: only keep initial mapping for ram
Date
0 mean any e820 type will be kept, and only hole is removed.

change to E820_RAM and E820_RESERVED_KERN only.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
arch/x86/mm/init_64.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 61b3c44..4898e80 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -373,7 +373,8 @@ phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end,
next = (addr & PAGE_MASK) + PAGE_SIZE;
if (addr >= end) {
if (!after_bootmem &&
- !e820_any_mapped(addr & PAGE_MASK, next, 0))
+ !e820_any_mapped(addr & PAGE_MASK, next, E820_RAM) &&
+ !e820_any_mapped(addr & PAGE_MASK, next, E820_RESERVED_KERN))
set_pte(pte, __pte(0));
continue;
}
@@ -420,7 +421,8 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
next = (address & PMD_MASK) + PMD_SIZE;
if (address >= end) {
if (!after_bootmem &&
- !e820_any_mapped(address & PMD_MASK, next, 0))
+ !e820_any_mapped(address & PMD_MASK, next, E820_RAM) &&
+ !e820_any_mapped(address & PMD_MASK, next, E820_RESERVED_KERN))
set_pmd(pmd, __pmd(0));
continue;
}
@@ -494,7 +496,8 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
next = (addr & PUD_MASK) + PUD_SIZE;
if (addr >= end) {
if (!after_bootmem &&
- !e820_any_mapped(addr & PUD_MASK, next, 0))
+ !e820_any_mapped(addr & PUD_MASK, next, E820_RAM) &&
+ !e820_any_mapped(addr & PUD_MASK, next, E820_RESERVED_KERN))
set_pud(pud, __pud(0));
continue;
}
--
1.7.7


\
 
 \ /
  Last update: 2012-10-10 02:41    [W:0.224 / U:0.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site