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Arnd Bergmann authored
The fl_flow_key structure is around 500 bytes, so having two of them on the stack in one function now exceeds the warning limit after an otherwise correct change: net/sched/cls_flower.c:298:12: error: stack frame size of 1056 bytes in function 'fl_classify' [-Werror,-Wframe-larger-than=] I suspect the fl_classify function could be reworked to only have one of them on the stack and modify it in place, but I could not work out how to do that. As a somewhat hacky workaround, move one of them into an out-of-line function to reduce its scope. This does not necessarily reduce the stack usage of the outer function, but at least the second copy is removed from the stack during most of it and does not add up to whatever is called from there. I now see 552 bytes of stack usage for fl_classify(), plus 528 bytes for fl_mask_lookup(). Fixes: 58cff782 ("flow_dissector: Parse multiple MPLS Label Stack Entries") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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