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vme: bridges: reduce stack usage
[ Upstream commit 7483e7a939
]
With CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3, the stack usage in vme_fake
grows above the warning limit:
drivers/vme/bridges/vme_fake.c: In function 'fake_master_read':
drivers/vme/bridges/vme_fake.c:610:1: error: the frame size of 1160 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
drivers/vme/bridges/vme_fake.c: In function 'fake_master_write':
drivers/vme/bridges/vme_fake.c:797:1: error: the frame size of 1160 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
The problem is that in some configurations, each call to
fake_vmereadX() puts another variable on the stack.
Reduce the amount of inlining to get back to the previous state,
with no function using more than 200 bytes each.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20200107200610.3482901-1-arnd@arndb.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
6439e61a69
commit
8f8d6aebe2
1 changed files with 18 additions and 12 deletions
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@ -418,8 +418,9 @@ static void fake_lm_check(struct fake_driver *bridge, unsigned long long addr,
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}
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}
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static u8 fake_vmeread8(struct fake_driver *bridge, unsigned long long addr,
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u32 aspace, u32 cycle)
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static noinline_for_stack u8 fake_vmeread8(struct fake_driver *bridge,
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unsigned long long addr,
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u32 aspace, u32 cycle)
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{
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u8 retval = 0xff;
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int i;
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@ -450,8 +451,9 @@ static u8 fake_vmeread8(struct fake_driver *bridge, unsigned long long addr,
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return retval;
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}
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static u16 fake_vmeread16(struct fake_driver *bridge, unsigned long long addr,
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u32 aspace, u32 cycle)
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static noinline_for_stack u16 fake_vmeread16(struct fake_driver *bridge,
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unsigned long long addr,
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u32 aspace, u32 cycle)
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{
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u16 retval = 0xffff;
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int i;
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@ -482,8 +484,9 @@ static u16 fake_vmeread16(struct fake_driver *bridge, unsigned long long addr,
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return retval;
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}
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static u32 fake_vmeread32(struct fake_driver *bridge, unsigned long long addr,
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u32 aspace, u32 cycle)
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static noinline_for_stack u32 fake_vmeread32(struct fake_driver *bridge,
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unsigned long long addr,
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u32 aspace, u32 cycle)
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{
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u32 retval = 0xffffffff;
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int i;
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@ -613,8 +616,9 @@ static ssize_t fake_master_read(struct vme_master_resource *image, void *buf,
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return retval;
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}
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static void fake_vmewrite8(struct fake_driver *bridge, u8 *buf,
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unsigned long long addr, u32 aspace, u32 cycle)
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static noinline_for_stack void fake_vmewrite8(struct fake_driver *bridge,
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u8 *buf, unsigned long long addr,
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u32 aspace, u32 cycle)
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{
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int i;
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unsigned long long start, end, offset;
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@ -643,8 +647,9 @@ static void fake_vmewrite8(struct fake_driver *bridge, u8 *buf,
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}
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static void fake_vmewrite16(struct fake_driver *bridge, u16 *buf,
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unsigned long long addr, u32 aspace, u32 cycle)
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static noinline_for_stack void fake_vmewrite16(struct fake_driver *bridge,
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u16 *buf, unsigned long long addr,
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u32 aspace, u32 cycle)
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{
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int i;
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unsigned long long start, end, offset;
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@ -673,8 +678,9 @@ static void fake_vmewrite16(struct fake_driver *bridge, u16 *buf,
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}
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static void fake_vmewrite32(struct fake_driver *bridge, u32 *buf,
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unsigned long long addr, u32 aspace, u32 cycle)
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static noinline_for_stack void fake_vmewrite32(struct fake_driver *bridge,
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u32 *buf, unsigned long long addr,
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u32 aspace, u32 cycle)
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{
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int i;
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unsigned long long start, end, offset;
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