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powerpc: Simplify push_end definition in pci_32.c

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The push_end macro in arch/powerpc/kernel/pci_32.c uses integer
division and multiplication to achieve the effect of rounding a
resource end address up and then advancing it to the end of a
power-of-2 sized region.  This changes it to an equivalent computation
that only needs an integer add and OR.  This is partly based on an
earlier patch by Mel Gorman.

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras 2006-06-15 18:03:32 +10:00
parent bf72aeba2f
commit 0f582bc1f2
1 changed files with 4 additions and 3 deletions
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7
arch/powerpc/kernel/pci_32.c
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@ -1113,9 +1113,10 @@ check_for_io_childs(struct pci_bus *bus, struct resource* res, int *found_vga)
int i;
int rc = 0;
#define push_end(res, size) do { unsigned long __sz = (size) ; \
res->end = ((res->end + __sz) / (__sz + 1)) * (__sz + 1) + __sz; \
} while (0)
#define push_end(res, mask) do { \
BUG_ON((mask+1) & mask); \
res->end = (res->end + mask) | mask; \
} while (0)
list_for_each_entry(dev, &bus->devices, bus_list) {
u16 class = dev->class >> 8;