}
}
-/*
- * 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)