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| author | Rusty Russell <rusty@rustcorp.com.au> | 2008-01-01 21:48:36 +1100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-01 11:30:35 -0800 |
| commit | 476c6c11a9ee4610ff0e4941e3851729f7caf062 (patch) | |
| tree | 19dc184b4a01f4c4984e347cf2b875a104478f66 /arch | |
| parent | e697789d64f8748cb219d7f5c413c512953802cc (diff) | |
| download | linux-3.10-476c6c11a9ee4610ff0e4941e3851729f7caf062.tar.gz linux-3.10-476c6c11a9ee4610ff0e4941e3851729f7caf062.tar.bz2 linux-3.10-476c6c11a9ee4610ff0e4941e3851729f7caf062.zip | |
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 <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | 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 ac0637a6d71..fbad51fce67 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) */ |