* [PATCH 1/2] Don't inline __const_udelay
@ 2015-04-08 13:15 Andi Kleen
2015-04-08 13:15 ` [PATCH 2/2] Mark spinlocks noinline when inline spinlocks are disabled Andi Kleen
0 siblings, 1 reply; 2+ messages in thread
From: Andi Kleen @ 2015-04-08 13:15 UTC (permalink / raw)
To: x86; +Cc: linux-kernel, Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
__const_udelay is marked inline, and LTO will happily inline it everywhere
Dropping the inline saves ~44k text in a LTO build.
13999560 1740864 1499136 17239560 1070e08 vmlinux-with-udelay-inline
13954764 1736768 1499136 17190668 1064f0c vmlinux-wo-udelay-inline
Even without LTO I believe marking it noinline documents it correctly.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/lib/delay.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c
index 39d6a3d..540a320 100644
--- a/arch/x86/lib/delay.c
+++ b/arch/x86/lib/delay.c
@@ -112,7 +112,7 @@ void __delay(unsigned long loops)
}
EXPORT_SYMBOL(__delay);
-inline void __const_udelay(unsigned long xloops)
+void __const_udelay(unsigned long xloops)
{
int d0;
--
2.3.3
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH 2/2] Mark spinlocks noinline when inline spinlocks are disabled
2015-04-08 13:15 [PATCH 1/2] Don't inline __const_udelay Andi Kleen
@ 2015-04-08 13:15 ` Andi Kleen
0 siblings, 0 replies; 2+ messages in thread
From: Andi Kleen @ 2015-04-08 13:15 UTC (permalink / raw)
To: x86; +Cc: linux-kernel, Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Otherwise LTO will inline them anyways and cause a large
kernel text increase.
Since the explicit intention here is to not inline them marking
them noinline is good documentation even for the non LTO case.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
kernel/locking/spinlock.c | 56 +++++++++++++++++++++++------------------------
1 file changed, 28 insertions(+), 28 deletions(-)
diff --git a/kernel/locking/spinlock.c b/kernel/locking/spinlock.c
index db3ccb1..90b8a0a 100644
--- a/kernel/locking/spinlock.c
+++ b/kernel/locking/spinlock.c
@@ -130,7 +130,7 @@ BUILD_LOCK_OPS(write, rwlock);
#endif
#ifndef CONFIG_INLINE_SPIN_TRYLOCK
-int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock)
+noinline int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock)
{
return __raw_spin_trylock(lock);
}
@@ -138,7 +138,7 @@ EXPORT_SYMBOL(_raw_spin_trylock);
#endif
#ifndef CONFIG_INLINE_SPIN_TRYLOCK_BH
-int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock)
+noinline int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock)
{
return __raw_spin_trylock_bh(lock);
}
@@ -146,7 +146,7 @@ EXPORT_SYMBOL(_raw_spin_trylock_bh);
#endif
#ifndef CONFIG_INLINE_SPIN_LOCK
-void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)
+noinline void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)
{
__raw_spin_lock(lock);
}
@@ -154,7 +154,7 @@ EXPORT_SYMBOL(_raw_spin_lock);
#endif
#ifndef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
-unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
+noinline unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
{
return __raw_spin_lock_irqsave(lock);
}
@@ -162,7 +162,7 @@ EXPORT_SYMBOL(_raw_spin_lock_irqsave);
#endif
#ifndef CONFIG_INLINE_SPIN_LOCK_IRQ
-void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
+noinline void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
{
__raw_spin_lock_irq(lock);
}
@@ -170,7 +170,7 @@ EXPORT_SYMBOL(_raw_spin_lock_irq);
#endif
#ifndef CONFIG_INLINE_SPIN_LOCK_BH
-void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
+noinline void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
{
__raw_spin_lock_bh(lock);
}
@@ -178,7 +178,7 @@ EXPORT_SYMBOL(_raw_spin_lock_bh);
#endif
#ifdef CONFIG_UNINLINE_SPIN_UNLOCK
-void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
+noinline void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
{
__raw_spin_unlock(lock);
}
@@ -186,7 +186,7 @@ EXPORT_SYMBOL(_raw_spin_unlock);
#endif
#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
-void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
+noinline void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
{
__raw_spin_unlock_irqrestore(lock, flags);
}
@@ -194,7 +194,7 @@ EXPORT_SYMBOL(_raw_spin_unlock_irqrestore);
#endif
#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQ
-void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)
+noinline void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)
{
__raw_spin_unlock_irq(lock);
}
@@ -202,7 +202,7 @@ EXPORT_SYMBOL(_raw_spin_unlock_irq);
#endif
#ifndef CONFIG_INLINE_SPIN_UNLOCK_BH
-void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
+noinline void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
{
__raw_spin_unlock_bh(lock);
}
@@ -210,7 +210,7 @@ EXPORT_SYMBOL(_raw_spin_unlock_bh);
#endif
#ifndef CONFIG_INLINE_READ_TRYLOCK
-int __lockfunc _raw_read_trylock(rwlock_t *lock)
+noinline int __lockfunc _raw_read_trylock(rwlock_t *lock)
{
return __raw_read_trylock(lock);
}
@@ -218,7 +218,7 @@ EXPORT_SYMBOL(_raw_read_trylock);
#endif
#ifndef CONFIG_INLINE_READ_LOCK
-void __lockfunc _raw_read_lock(rwlock_t *lock)
+noinline void __lockfunc _raw_read_lock(rwlock_t *lock)
{
__raw_read_lock(lock);
}
@@ -226,7 +226,7 @@ EXPORT_SYMBOL(_raw_read_lock);
#endif
#ifndef CONFIG_INLINE_READ_LOCK_IRQSAVE
-unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
+noinline unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
{
return __raw_read_lock_irqsave(lock);
}
@@ -234,7 +234,7 @@ EXPORT_SYMBOL(_raw_read_lock_irqsave);
#endif
#ifndef CONFIG_INLINE_READ_LOCK_IRQ
-void __lockfunc _raw_read_lock_irq(rwlock_t *lock)
+noinline void __lockfunc _raw_read_lock_irq(rwlock_t *lock)
{
__raw_read_lock_irq(lock);
}
@@ -242,7 +242,7 @@ EXPORT_SYMBOL(_raw_read_lock_irq);
#endif
#ifndef CONFIG_INLINE_READ_LOCK_BH
-void __lockfunc _raw_read_lock_bh(rwlock_t *lock)
+noinline void __lockfunc _raw_read_lock_bh(rwlock_t *lock)
{
__raw_read_lock_bh(lock);
}
@@ -250,7 +250,7 @@ EXPORT_SYMBOL(_raw_read_lock_bh);
#endif
#ifndef CONFIG_INLINE_READ_UNLOCK
-void __lockfunc _raw_read_unlock(rwlock_t *lock)
+noinline void __lockfunc _raw_read_unlock(rwlock_t *lock)
{
__raw_read_unlock(lock);
}
@@ -258,7 +258,7 @@ EXPORT_SYMBOL(_raw_read_unlock);
#endif
#ifndef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
-void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
+noinline void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
__raw_read_unlock_irqrestore(lock, flags);
}
@@ -266,7 +266,7 @@ EXPORT_SYMBOL(_raw_read_unlock_irqrestore);
#endif
#ifndef CONFIG_INLINE_READ_UNLOCK_IRQ
-void __lockfunc _raw_read_unlock_irq(rwlock_t *lock)
+noinline void __lockfunc _raw_read_unlock_irq(rwlock_t *lock)
{
__raw_read_unlock_irq(lock);
}
@@ -274,7 +274,7 @@ EXPORT_SYMBOL(_raw_read_unlock_irq);
#endif
#ifndef CONFIG_INLINE_READ_UNLOCK_BH
-void __lockfunc _raw_read_unlock_bh(rwlock_t *lock)
+noinline void __lockfunc _raw_read_unlock_bh(rwlock_t *lock)
{
__raw_read_unlock_bh(lock);
}
@@ -282,7 +282,7 @@ EXPORT_SYMBOL(_raw_read_unlock_bh);
#endif
#ifndef CONFIG_INLINE_WRITE_TRYLOCK
-int __lockfunc _raw_write_trylock(rwlock_t *lock)
+noinline int __lockfunc _raw_write_trylock(rwlock_t *lock)
{
return __raw_write_trylock(lock);
}
@@ -290,7 +290,7 @@ EXPORT_SYMBOL(_raw_write_trylock);
#endif
#ifndef CONFIG_INLINE_WRITE_LOCK
-void __lockfunc _raw_write_lock(rwlock_t *lock)
+noinline void __lockfunc _raw_write_lock(rwlock_t *lock)
{
__raw_write_lock(lock);
}
@@ -298,7 +298,7 @@ EXPORT_SYMBOL(_raw_write_lock);
#endif
#ifndef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
-unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
+noinline unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
{
return __raw_write_lock_irqsave(lock);
}
@@ -306,7 +306,7 @@ EXPORT_SYMBOL(_raw_write_lock_irqsave);
#endif
#ifndef CONFIG_INLINE_WRITE_LOCK_IRQ
-void __lockfunc _raw_write_lock_irq(rwlock_t *lock)
+noinline void __lockfunc _raw_write_lock_irq(rwlock_t *lock)
{
__raw_write_lock_irq(lock);
}
@@ -314,7 +314,7 @@ EXPORT_SYMBOL(_raw_write_lock_irq);
#endif
#ifndef CONFIG_INLINE_WRITE_LOCK_BH
-void __lockfunc _raw_write_lock_bh(rwlock_t *lock)
+noinline void __lockfunc _raw_write_lock_bh(rwlock_t *lock)
{
__raw_write_lock_bh(lock);
}
@@ -322,7 +322,7 @@ EXPORT_SYMBOL(_raw_write_lock_bh);
#endif
#ifndef CONFIG_INLINE_WRITE_UNLOCK
-void __lockfunc _raw_write_unlock(rwlock_t *lock)
+noinline void __lockfunc _raw_write_unlock(rwlock_t *lock)
{
__raw_write_unlock(lock);
}
@@ -330,7 +330,7 @@ EXPORT_SYMBOL(_raw_write_unlock);
#endif
#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
-void __lockfunc _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
+noinline void __lockfunc _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
__raw_write_unlock_irqrestore(lock, flags);
}
@@ -338,7 +338,7 @@ EXPORT_SYMBOL(_raw_write_unlock_irqrestore);
#endif
#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQ
-void __lockfunc _raw_write_unlock_irq(rwlock_t *lock)
+noinline void __lockfunc _raw_write_unlock_irq(rwlock_t *lock)
{
__raw_write_unlock_irq(lock);
}
@@ -346,7 +346,7 @@ EXPORT_SYMBOL(_raw_write_unlock_irq);
#endif
#ifndef CONFIG_INLINE_WRITE_UNLOCK_BH
-void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
+noinline void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
{
__raw_write_unlock_bh(lock);
}
--
2.3.3
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2015-04-08 13:17 UTC | newest]
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