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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-04-09 12:33:07 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-04-09 12:33:07 -0400 |
| commit | ffae3d0e3606b2e274c9ec1b969342d630b2ecae (patch) | |
| tree | 8dbe20e674f88fa4b19a960a36ba45edef15bc86 /arch/ia64/kernel/pci-dma.c | |
| parent | 39e8202bb3b83a826e5825b1a07bbbf30ae9a140 (diff) | |
| download | talos-obmc-linux-ffae3d0e3606b2e274c9ec1b969342d630b2ecae.tar.gz talos-obmc-linux-ffae3d0e3606b2e274c9ec1b969342d630b2ecae.zip | |
tile: comment assumption about __insn_mtspr for <asm/irqflags.h>
The arch_local_irq_save(), etc., routines are required to function
as compiler barriers. They do, but it's subtle and requires knowing
that the gcc builtin __insn_mtspr() is marked as a memory clobber.
Provide a comment explaining the assumption.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/ia64/kernel/pci-dma.c')
0 files changed, 0 insertions, 0 deletions
