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authorAndi Kleen <ak@suse.de>2005-09-12 18:49:24 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-12 10:49:58 -0700
commit3f74478b5fd7263e9311cdb320923d599c73a792 (patch)
treed61962b55cc7bae06cf872f35d8ab3ae753c70c1 /include
parent459192c92cde49d1a2f721c90adf45d774c2dcf5 (diff)
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[PATCH] x86-64: Some cleanup and optimization to the processor data area.
- Remove unused irqrsp field - Remove pda->me - Optimize set_softirq_pending slightly Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86_64/hardirq.h9
-rw-r--r--include/asm-x86_64/pda.h12
-rw-r--r--include/linux/interrupt.h7
3 files changed, 17 insertions, 11 deletions
diff --git a/include/asm-x86_64/hardirq.h b/include/asm-x86_64/hardirq.h
index 27c381fa1c9..8661b476fb4 100644
--- a/include/asm-x86_64/hardirq.h
+++ b/include/asm-x86_64/hardirq.h
@@ -9,11 +9,12 @@
#define __ARCH_IRQ_STAT 1
-/* Generate a lvalue for a pda member. Should fix softirq.c instead to use
- special access macros. This would generate better code. */
-#define __IRQ_STAT(cpu,member) (read_pda(me)->member)
+#define local_softirq_pending() read_pda(__softirq_pending)
-#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
+#define __ARCH_SET_SOFTIRQ_PENDING 1
+
+#define set_softirq_pending(x) write_pda(__softirq_pending, (x))
+#define or_softirq_pending(x) or_pda(__softirq_pending, (x))
/*
* 'what should we do if we get a hw irq event on an illegal vector'.
diff --git a/include/asm-x86_64/pda.h b/include/asm-x86_64/pda.h
index e16d76c9deb..bbf89aa8a1a 100644
--- a/include/asm-x86_64/pda.h
+++ b/include/asm-x86_64/pda.h
@@ -10,10 +10,8 @@
struct x8664_pda {
struct task_struct *pcurrent; /* Current process */
unsigned long data_offset; /* Per cpu data offset from linker address */
- struct x8664_pda *me; /* Pointer to itself */
unsigned long kernelstack; /* top of kernel stack for current */
unsigned long oldrsp; /* user rsp for system call */
- unsigned long irqrsp; /* Old rsp for interrupts. */
int irqcount; /* Irq nesting counter. Starts with -1 */
int cpunumber; /* Logical CPU number */
char *irqstackptr; /* top of irqstack */
@@ -42,13 +40,14 @@ extern void __bad_pda_field(void);
#define pda_offset(field) offsetof(struct x8664_pda, field)
#define pda_to_op(op,field,val) do { \
+ typedef typeof_field(struct x8664_pda, field) T__; \
switch (sizeof_field(struct x8664_pda, field)) { \
case 2: \
-asm volatile(op "w %0,%%gs:%P1"::"r" (val),"i"(pda_offset(field)):"memory"); break; \
+asm volatile(op "w %0,%%gs:%P1"::"ri" ((T__)val),"i"(pda_offset(field)):"memory"); break; \
case 4: \
-asm volatile(op "l %0,%%gs:%P1"::"r" (val),"i"(pda_offset(field)):"memory"); break; \
+asm volatile(op "l %0,%%gs:%P1"::"ri" ((T__)val),"i"(pda_offset(field)):"memory"); break; \
case 8: \
-asm volatile(op "q %0,%%gs:%P1"::"r" (val),"i"(pda_offset(field)):"memory"); break; \
+asm volatile(op "q %0,%%gs:%P1"::"ri" ((T__)val),"i"(pda_offset(field)):"memory"); break; \
default: __bad_pda_field(); \
} \
} while (0)
@@ -58,7 +57,7 @@ asm volatile(op "q %0,%%gs:%P1"::"r" (val),"i"(pda_offset(field)):"memory"); bre
* Unfortunately removing them causes all hell to break lose currently.
*/
#define pda_from_op(op,field) ({ \
- typedef typeof_field(struct x8664_pda, field) T__; T__ ret__; \
+ typeof_field(struct x8664_pda, field) ret__; \
switch (sizeof_field(struct x8664_pda, field)) { \
case 2: \
asm volatile(op "w %%gs:%P1,%0":"=r" (ret__):"i"(pda_offset(field)):"memory"); break;\
@@ -75,6 +74,7 @@ asm volatile(op "q %%gs:%P1,%0":"=r" (ret__):"i"(pda_offset(field)):"memory"); b
#define write_pda(field,val) pda_to_op("mov",field,val)
#define add_pda(field,val) pda_to_op("add",field,val)
#define sub_pda(field,val) pda_to_op("sub",field,val)
+#define or_pda(field,val) pda_to_op("or",field,val)
#endif
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index d99e7aeb7d3..0a90205184b 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -57,6 +57,11 @@ extern void disable_irq(unsigned int irq);
extern void enable_irq(unsigned int irq);
#endif
+#ifndef __ARCH_SET_SOFTIRQ_PENDING
+#define set_softirq_pending(x) (local_softirq_pending() = (x))
+#define or_softirq_pending(x) (local_softirq_pending() |= (x))
+#endif
+
/*
* Temporary defines for UP kernels, until all code gets fixed.
*/
@@ -123,7 +128,7 @@ struct softirq_action
asmlinkage void do_softirq(void);
extern void open_softirq(int nr, void (*action)(struct softirq_action*), void *data);
extern void softirq_init(void);
-#define __raise_softirq_irqoff(nr) do { local_softirq_pending() |= 1UL << (nr); } while (0)
+#define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0)
extern void FASTCALL(raise_softirq_irqoff(unsigned int nr));
extern void FASTCALL(raise_softirq(unsigned int nr));