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author | Ingo Molnar <mingo@elte.hu> | 2009-02-26 13:22:13 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-02-26 13:22:13 +0100 |
commit | 4434e5156409eb3ec98f5ad7f0a0c07ebafe970d (patch) | |
tree | c7f148cdae7a6cf4013253c6c2dbd1c49e837e32 /drivers/pci/msi.c | |
parent | 2b8f836fb196acede88b6cc772e9057e0a9c0223 (diff) | |
parent | 694593e3374a67d95ece6a275a1f181644c2c4d8 (diff) |
Merge branches 'sched/cleanups', 'sched/urgent' and 'linus' into sched/core
Diffstat (limited to 'drivers/pci/msi.c')
-rw-r--r-- | drivers/pci/msi.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 44f15ff70c1d..baba2eb5367d 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -103,14 +103,12 @@ static void msix_set_enable(struct pci_dev *dev, int enable) } } -/* - * Essentially, this is ((1 << (1 << x)) - 1), but without the - * undefinedness of a << 32. - */ static inline __attribute_const__ u32 msi_mask(unsigned x) { - static const u32 mask[] = { 1, 2, 4, 0xf, 0xff, 0xffff, 0xffffffff }; - return mask[x]; + /* Don't shift by >= width of type */ + if (x >= 5) + return 0xffffffff; + return (1 << (1 << x)) - 1; } static void msix_flush_writes(struct irq_desc *desc) |