powerpc/cell/oprofile: Fix test on overlay_tbl_offset in vma_map

Offset is unsigned and when an address isn't found in the vma map
vma_map_lookup() returns the vma physical address + 0x10000000.

vma_map_lookup used to return 0xffffffff on a failed lookup, but
a change was made to return the vma physical address + 0x10000000
There are two callers of vam_map_lookup: one of them correctly
deals with this new return value, but the other (below) did not.

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Acked-by: Maynard Johnson <maynardj@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/oprofile/cell/vma_map.c b/arch/powerpc/oprofile/cell/vma_map.c
index fff6666..258fa44 100644 (file)
--- a/arch/powerpc/oprofile/cell/vma_map.c
+++ b/arch/powerpc/oprofile/cell/vma_map.c
@@ -229,7 +229,7 @@ struct vma_to_fileoffset_map *create_vma_map(const struct spu *aSpu,
         */
        overlay_tbl_offset = vma_map_lookup(map, ovly_table_sym,
                                            aSpu, &grd_val);
-       if (overlay_tbl_offset < 0) {
+       if (overlay_tbl_offset > 0x10000000) {
                printk(KERN_ERR "SPU_PROF: "
                       "%s, line %d: Error finding SPU overlay table\n",
                       __func__, __LINE__);