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authorPaul Mackerras <paulus@samba.org>2006-06-15 18:03:32 +1000
committerPaul Mackerras <paulus@samba.org>2006-06-15 19:25:50 +1000
commit0f582bc1f2cccacd613c411fbea55873d17c3429 (patch)
tree83fc9e579bb520a876ffd75910861c811a0eac14 /arch/powerpc
parentbf72aeba2ffef599d1d386425c9e46b82be657cd (diff)
powerpc: Simplify push_end definition in pci_32.c
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>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/pci_32.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index b129d2e4b75..c858eb4bef1 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -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;