AcoSail/kernel_optimize_test
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ethtool: reduce stack usage

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dev_ethtool() is currently using 604 bytes of stack, even with gcc-4.4.2

objdump -d vmlinux | scripts/checkstack.pl
...
0xc04bbc33 dev_ethtool [vmlinux]:			604
...
Adding noinline attributes to selected functions can reduce stack usage.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-02-15 21:51:33 -08:00 committed by David S. Miller
parent 5cdaaa1286
commit 339c6e9985
1 changed files with 28 additions and 7 deletions
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35
net/core/ethtool.c
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@ -197,7 +197,10 @@ static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
return dev->ethtool_ops->set_settings(dev, &cmd);
}
static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
/*
* noinline attribute so that gcc doesnt use too much stack in dev_ethtool()
*/
static noinline int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
{
struct ethtool_drvinfo info;
const struct ethtool_ops *ops = dev->ethtool_ops;
@ -232,7 +235,10 @@ static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
return 0;
}
static int ethtool_set_rxnfc(struct net_device *dev, void __user *useraddr)
/*
* noinline attribute so that gcc doesnt use too much stack in dev_ethtool()
*/
static noinline int ethtool_set_rxnfc(struct net_device *dev, void __user *useraddr)
{
struct ethtool_rxnfc cmd;
@ -245,7 +251,10 @@ static int ethtool_set_rxnfc(struct net_device *dev, void __user *useraddr)
return dev->ethtool_ops->set_rxnfc(dev, &cmd);
}
static int ethtool_get_rxnfc(struct net_device *dev, void __user *useraddr)
/*
* noinline attribute so that gcc doesnt use too much stack in dev_ethtool()
*/
static noinline int ethtool_get_rxnfc(struct net_device *dev, void __user *useraddr)
{
struct ethtool_rxnfc info;
const struct ethtool_ops *ops = dev->ethtool_ops;
@ -317,7 +326,10 @@ static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list,
list->count++;
}
static int ethtool_set_rx_ntuple(struct net_device *dev, void __user *useraddr)
/*
* noinline attribute so that gcc doesnt use too much stack in dev_ethtool()
*/
static noinline int ethtool_set_rx_ntuple(struct net_device *dev, void __user *useraddr)
{
struct ethtool_rx_ntuple cmd;
const struct ethtool_ops *ops = dev->ethtool_ops;
@ -788,7 +800,10 @@ static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
return ret;
}
static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
/*
* noinline attribute so that gcc doesnt use too much stack in dev_ethtool()
*/
static noinline int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
{
struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
@ -802,7 +817,10 @@ static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
return 0;
}
static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
/*
* noinline attribute so that gcc doesnt use too much stack in dev_ethtool()
*/
static noinline int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
{
struct ethtool_coalesce coalesce;
@ -1212,7 +1230,10 @@ static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
return actor(dev, edata.data);
}
static int ethtool_flash_device(struct net_device *dev, char __user *useraddr)
/*
* noinline attribute so that gcc doesnt use too much stack in dev_ethtool()
*/
static noinline int ethtool_flash_device(struct net_device *dev, char __user *useraddr)
{
struct ethtool_flash efl;