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    Subject[PATCH] prefetch() not declared in net/ipv4/route.c on s390x
    The recent commit (9f28a2fc0bd77511f649c0a788c7bf9a5fd04edb) to route.c
    breaks build on s390x because it leaves prefetch() undeclared.

    net/ipv4/route.c: In function 'rt_check_expire':
    net/ipv4/route.c:874:4: error: implicit declaration of function 'prefetch' [-Werror=implicit-function-declaration]
    cc1: some warnings being treated as errors
    make[2]: *** [net/ipv4/route.o] Error 1

    Signed-off-by: Dan Horák <>
    net/ipv4/route.c | 1 +
    1 files changed, 1 insertions(+), 0 deletions(-)

    diff --git a/net/ipv4/route.c b/net/ipv4/route.c
    index 252c512..85cc053 100644
    --- a/net/ipv4/route.c
    +++ b/net/ipv4/route.c
    @@ -91,6 +91,7 @@
    #include <linux/rcupdate.h>
    #include <linux/times.h>
    #include <linux/slab.h>
    +#include <linux/prefetch.h>
    #include <net/dst.h>
    #include <net/net_namespace.h>
    #include <net/protocol.h>
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