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x86/kvm: Fix pvclock vsyscall fixmap 

The physical memory fixmapped for the pvclock clock_gettime vsyscall
was allocated, and thus is not a kernel symbol. __pa() is the proper
method to use in this case.

Fixes the crash below when booting a next-20130204+ smp guest on a
3.8-rc5+ KVM host.

[    0.666410] udevd[97]: starting version 175
[    0.674043] udevd[97]: udevd:[97]: segfault at ffffffffff5fd020
     ip 00007fff069e277f sp 00007fff068c9ef8 error d

Acked-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Peter Hurley 2013-02-27 15:28:28 -05:00 committed by Gleb Natapov
parent 2a7d2b96d5
commit 3d2a80a230
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/pvclock.c
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@ -185,7 +185,7 @@ int __init pvclock_init_vsyscall(struct pvclock_vsyscall_time_info *i,
for (idx = 0; idx <= (PVCLOCK_FIXMAP_END-PVCLOCK_FIXMAP_BEGIN); idx++) { for (idx = 0; idx <= (PVCLOCK_FIXMAP_END-PVCLOCK_FIXMAP_BEGIN); idx++) {
__set_fixmap(PVCLOCK_FIXMAP_BEGIN + idx, __set_fixmap(PVCLOCK_FIXMAP_BEGIN + idx,
__pa_symbol(i) + (idx*PAGE_SIZE), __pa(i) + (idx*PAGE_SIZE),
PAGE_KERNEL_VVAR); PAGE_KERNEL_VVAR);
} }