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| author | Arnd Bergmann <arnd@arndb.de> | 2019-03-07 18:58:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-17 21:46:55 +0300 |
| commit | 81f7503fb41bf734bfc7ce2d38bb537d3c15214b (patch) | |
| tree | 0cd9ab0fb54e4cc709e79e8bf818eab66273a3aa /net/core | |
| parent | 30db8e400c4db194df58562ed884fa79899834e5 (diff) | |
| download | linux-81f7503fb41bf734bfc7ce2d38bb537d3c15214b.tar.xz | |
ethtool: reduce stack usage with clang
commit 3499e87ea0413ee5b2cc028f4c8ed4d424bc7f98 upstream.
clang inlines the dev_ethtool() more aggressively than gcc does, leading
to a larger amount of used stack space:
net/core/ethtool.c:2536:24: error: stack frame size of 1216 bytes in function 'dev_ethtool' [-Werror,-Wframe-larger-than=]
Marking the sub-functions that require the most stack space as
noinline_for_stack gives us reasonable behavior on all compilers.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/ethtool.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 09d828a6a173..1011625a0ca4 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -2413,9 +2413,10 @@ static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) return ret; } -static int ethtool_get_per_queue_coalesce(struct net_device *dev, - void __user *useraddr, - struct ethtool_per_queue_op *per_queue_opt) +static noinline_for_stack int +ethtool_get_per_queue_coalesce(struct net_device *dev, + void __user *useraddr, + struct ethtool_per_queue_op *per_queue_opt) { u32 bit; int ret; @@ -2443,9 +2444,10 @@ static int ethtool_get_per_queue_coalesce(struct net_device *dev, return 0; } -static int ethtool_set_per_queue_coalesce(struct net_device *dev, - void __user *useraddr, - struct ethtool_per_queue_op *per_queue_opt) +static noinline_for_stack int +ethtool_set_per_queue_coalesce(struct net_device *dev, + void __user *useraddr, + struct ethtool_per_queue_op *per_queue_opt) { u32 bit; int i, ret = 0; @@ -2499,7 +2501,7 @@ roll_back: return ret; } -static int ethtool_set_per_queue(struct net_device *dev, +static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, void __user *useraddr, u32 sub_cmd) { struct ethtool_per_queue_op per_queue_opt; |