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| author |   Mark Fortescue <mark@mtfhpc.demon.co.uk> | 2007-07-31 02:03:11 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2007-07-31 02:03:11 -0700 |
| commit | da4e9fea85ea42c9c6ce163a85d5164efbec31a2 (patch) | |
| tree | b146756eda55bbfecc49465dbf49ec320624496b /arch/sparc | |
| parent | [SPARC] Videopix Frame Grabber: Fix unreleased lock in vfc_debug() (diff) | |
| download | linux-dev-da4e9fea85ea42c9c6ce163a85d5164efbec31a2.tar.xz linux-dev-da4e9fea85ea42c9c6ce163a85d5164efbec31a2.zip | |
[SPARC]: Fix exec failures on sun4c.
This deals with a sun4c issue caused by commit b6a2fea39318e43fee84fa7b0b90d68bed92d2ba:
mm: variable length argument support.
The new way the code works means that sun4c_update_mmu_cache gets
called before a context has been selected, which results in invalid
operation of the underling mm code.
Simply ignoring update requests when there is no valid context solves
the problem.
Signed-off-by Mark Fortescue <mark@mtfhpc.demon.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/mm/sun4c.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c index a57a366e339a..79d60d86f6f8 100644 --- a/arch/sparc/mm/sun4c.c +++ b/arch/sparc/mm/sun4c.c @@ -1999,6 +1999,9 @@ void sun4c_update_mmu_cache(struct vm_area_struct *vma, unsigned long address, p unsigned long flags; int pseg; + if (vma->vm_mm->context == NO_CONTEXT) + return; + local_irq_save(flags); address &= PAGE_MASK; if ((pseg = sun4c_get_segmap(address)) == invalid_segment) { |