diff options
| author | Helge Deller <deller@gmx.de> | 2009-06-16 20:51:48 +0000 |
|---|---|---|
| committer | Kyle McMartin <kyle@mcmartin.ca> | 2009-07-03 03:34:09 +0000 |
| commit | e82a3b75127188f20c7780bec580e148beb29da7 (patch) | |
| tree | 8a11d55123c20b5341a95941c77eb3d35e4ef9d8 /kernel/cred-internals.h | |
| parent | 84be31be3727d11b2a91781306b642e801c5a379 (diff) | |
parisc: ensure broadcast tlb purge runs single threaded
The TLB flushing functions on hppa, which causes PxTLB broadcasts on the system
bus, needs to be protected by irq-safe spinlocks to avoid irq handlers to deadlock
the kernel. The deadlocks only happened during I/O intensive loads and triggered
pretty seldom, which is why this bug went so long unnoticed.
Signed-off-by: Helge Deller <deller@gmx.de>
[edited to use spin_lock_irqsave on UP as well since we'd been locking there
all this time anyway, --kyle]
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Diffstat (limited to 'kernel/cred-internals.h')
0 files changed, 0 insertions, 0 deletions