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| author | Helge Deller | 2009-06-16 22:51:48 +0200 |
|---|---|---|
| committer | Kyle McMartin | 2009-07-03 05:34:09 +0200 |
| commit | e82a3b75127188f20c7780bec580e148beb29da7 (patch) | |
| tree | 8a11d55123c20b5341a95941c77eb3d35e4ef9d8 /arch/parisc/include/asm/unistd.h | |
| parent | parisc: fix "delay!" timer handling (diff) | |
| download | kernel-qcow2-linux-e82a3b75127188f20c7780bec580e148beb29da7.tar.gz kernel-qcow2-linux-e82a3b75127188f20c7780bec580e148beb29da7.tar.xz kernel-qcow2-linux-e82a3b75127188f20c7780bec580e148beb29da7.zip | |
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 'arch/parisc/include/asm/unistd.h')
0 files changed, 0 insertions, 0 deletions