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| author | Arnd Bergmann <arnd@arndb.de> | 2020-05-27 16:51:13 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-27 21:34:48 +0300 |
| commit | b3b6a84c6a920c60fd1393c43818b3955441424b (patch) | |
| tree | 1432d966e59de847d6fbdf59222e983e8684be2d /net/bridge | |
| parent | 7e0afbdfd13d1e708fe96e31c46c4897101a6a43 (diff) | |
| download | linux-b3b6a84c6a920c60fd1393c43818b3955441424b.tar.xz | |
bridge: multicast: work around clang bug
Clang-10 and clang-11 run into a corner case of the register
allocator on 32-bit ARM, leading to excessive stack usage from
register spilling:
net/bridge/br_multicast.c:2422:6: error: stack frame size of 1472 bytes in function 'br_multicast_get_stats' [-Werror,-Wframe-larger-than=]
Work around this by marking one of the internal functions as
noinline_for_stack.
Link: https://bugs.llvm.org/show_bug.cgi?id=45802#c9
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
| -rw-r--r-- | net/bridge/br_multicast.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index ad12fe3fca8c..83490bf73a13 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -2413,7 +2413,8 @@ void br_multicast_uninit_stats(struct net_bridge *br) free_percpu(br->mcast_stats); } -static void mcast_stats_add_dir(u64 *dst, u64 *src) +/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */ +static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src) { dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX]; dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX]; |