Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=476c6c11a9ee4610ff0e4941e3851729f7caf062
Commit: 476c6c11a9ee4610ff0e4941e3851729f7caf062
Parent: e697789d64f8748cb219d7f5c413c512953802cc
Author: Rusty Russell <[EMAIL PROTECTED]>
AuthorDate: Tue Jan 1 21:48:36 2008 +1100
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Jan 1 11:30:35 2008 -0800
fix lguest rmmod "bad pgd"
After 17d57a9206b4de6ad082ac9f2d2346985abbd2aa ("x86: fix x86-32 early
fixmap initialization.") removing lg.ko caused a printk from vunmap:
mm/memory.c:115: bad pgd 004b3027.
On the second use after module load, the kernel crashes.
This fixes the immediate problem (accessed and dirty bits not set as
expected in pmd_none_or_clear_bad). I can't see why this would cause
a crash, but I haven't been able to reproduce it once this is applied.
Signed-off-by: Rusty Russell <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/x86/kernel/head_32.S | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index ac0637a..fbad51f 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -196,7 +196,7 @@ default_entry:
/* Do an early initialization of the fixmap area */
movl $(swapper_pg_dir - __PAGE_OFFSET), %edx
movl $(swapper_pg_pmd - __PAGE_OFFSET), %eax
- addl $0x007, %eax /* 0x007 = PRESENT+RW+USER */
+ addl $0x67, %eax /* 0x67 == _PAGE_TABLE */
movl %eax, 4092(%edx)
xorl %ebx,%ebx /* This is the boot CPU (BSP) */
-
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