| commit | ef2b343e99e772e35f0f9d00f7db318b6629c16e | |
| author | Hugh Dickins <hugh@veritas.com> | |
| Fri, 10 Nov 2006 21:32:40 +0000 (10 21:32 +0000) | ||
| committer | Paul Mackerras <paulus@samba.org> | |
| Mon, 4 Dec 2006 09:39:20 +0000 (4 20:39 +1100) | ||
| tree | 386f9b6b1376ab99a478ab5d394572fca720d0ef | treesnapshot (tar.gz zip) |
| parent | 56291e19e37cf3bb8fc701ebf3aa8ffbf59f73ef | commitdiff |
[POWERPC] Make soft_enabled irqs preempt safe
Rewrite local_get_flags and local_irq_disable to use r13 explicitly,
to avoid the risk that gcc will split get_paca()->soft_enabled into a
sequence unsafe against preemption. Similar care in local_irq_restore.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Rewrite local_get_flags and local_irq_disable to use r13 explicitly,
to avoid the risk that gcc will split get_paca()->soft_enabled into a
sequence unsafe against preemption. Similar care in local_irq_restore.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| arch/powerpc/kernel/irq.c | diffblobblamehistory | |
| include/asm-powerpc/hw_irq.h | diffblobblamehistory |