diff options
| author | eadler <eadler@FreeBSD.org> | 2014-02-04 03:36:42 +0000 |
|---|---|---|
| committer | eadler <eadler@FreeBSD.org> | 2014-02-04 03:36:42 +0000 |
| commit | ec294fd7f5fc5de11ed889d6c2d701f918d1ecfb (patch) | |
| tree | 7e76e370b9406b0383b17bd343084addb4ad6a25 /sys/dev/agp | |
| parent | d374d7f398b846dc59d8a5ec3c7bfb318cf880af (diff) | |
| download | FreeBSD-src-ec294fd7f5fc5de11ed889d6c2d701f918d1ecfb.zip FreeBSD-src-ec294fd7f5fc5de11ed889d6c2d701f918d1ecfb.tar.gz | |
MFC r258779,r258780,r258787,r258822:
Fix undefined behavior: (1 << 31) is not defined as 1 is an int and this
shifts into the sign bit. Instead use (1U << 31) which gets the
expected result.
Similar to the (1 << 31) case it is not defined to do (2 << 30).
This fix is not ideal as it assumes a 32 bit int, but does fix the issue
for most cases.
A similar change was made in OpenBSD.
Diffstat (limited to 'sys/dev/agp')
| -rw-r--r-- | sys/dev/agp/agp_i810.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/dev/agp/agp_i810.c b/sys/dev/agp/agp_i810.c index 414a7a5..725aa99 100644 --- a/sys/dev/agp/agp_i810.c +++ b/sys/dev/agp/agp_i810.c @@ -2226,10 +2226,10 @@ agp_i830_chipset_flush(device_t dev) sc = device_get_softc(dev); pmap_invalidate_cache(); hic = bus_read_4(sc->sc_res[0], AGP_I830_HIC); - bus_write_4(sc->sc_res[0], AGP_I830_HIC, hic | (1 << 31)); + bus_write_4(sc->sc_res[0], AGP_I830_HIC, hic | (1U << 31)); for (i = 0; i < 20000 /* 1 sec */; i++) { hic = bus_read_4(sc->sc_res[0], AGP_I830_HIC); - if ((hic & (1 << 31)) == 0) + if ((hic & (1U << 31)) == 0) break; DELAY(50); } |
