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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-14 22:08:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-14 22:08:28 -0800 |
| commit | caf5b04c82f05c65843b2d7189845d6c3df5a41e (patch) | |
| tree | 57543bd382f065b1e9c368669a2f723e0721383f | |
| parent | 650eec5e04468d0611a60e6098464b7c43981552 (diff) | |
| download | linux-caf5b04c82f05c65843b2d7189845d6c3df5a41e.tar.bz2 | |
x86: Work around compiler code generation bug with -Os
Some versions of gcc generate incorrect code for the inet_check_attr()
function, apparently due to a totally bogus index -> pointer comparison
transformation.
At least "gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)" from FC4 is
affected, possibly others too.
This changes the function subtly so that the buggy gcc transformation
doesn't trigger.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | net/ipv4/fib_frontend.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 5b25fc0d980c..4e3d3811dea2 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -289,13 +289,13 @@ static int inet_check_attr(struct rtmsg *r, struct rtattr **rta) { int i; - for (i=1; i<=RTA_MAX; i++) { - struct rtattr *attr = rta[i-1]; + for (i=1; i<=RTA_MAX; i++, rta++) { + struct rtattr *attr = *rta; if (attr) { if (RTA_PAYLOAD(attr) < 4) return -EINVAL; if (i != RTA_MULTIPATH && i != RTA_METRICS) - rta[i-1] = (struct rtattr*)RTA_DATA(attr); + *rta = (struct rtattr*)RTA_DATA(attr); } } return 0; |