Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=da4e9fea85ea42c9c6ce163a85d5164efbec31a2
Commit: da4e9fea85ea42c9c6ce163a85d5164efbec31a2
Parent: 2fa3195d72f7d0cfb4dcb2b0dfa265ed0fa5cfa3
Author: Mark Fortescue <[EMAIL PROTECTED]>
AuthorDate: Tue Jul 31 02:03:11 2007 -0700
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Tue Jul 31 02:03:11 2007 -0700
[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 <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
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 a57a366..79d60d8 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) {
-
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