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| author | Benjamin Herrenschmidt <[email protected]> | 2008-06-02 06:22:59 +0000 |
|---|---|---|
| committer | Paul Mackerras <[email protected]> | 2008-06-09 01:32:36 +0000 |
| commit | 0be234a46596cd19eb56d2cf46836de8221afb6b (patch) | |
| tree | 5752259ba499e1e0e033df1fb59b8c57521a91ba /lib/debugobjects.c | |
| parent | [POWERPC] boot/Makefile CONFIG_ variable fixes (diff) | |
| download | kernel-0be234a46596cd19eb56d2cf46836de8221afb6b.tar.gz kernel-0be234a46596cd19eb56d2cf46836de8221afb6b.zip | |
[POWERPC] Fix incorrect enabling of VMX when building signal or user context
When building a signal or a ucontext, we can incorrectly set the MSR_VEC
bit of the kernel pt_regs->msr before returning to userspace if the task
-ever- used VMX.
This can lead to funny result if that stack used it in the past, then
"lost" it (ie. it wasn't enabled after a context switch for example)
and then called get_context. It can end up with VMX enabled and the
registers containing values from some other task.
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>
Diffstat (limited to 'lib/debugobjects.c')
0 files changed, 0 insertions, 0 deletions