[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>
diff --git a/include/asm-x86_64/pda.h b/include/asm-x86_64/pda.h
index e16d76c..bbf89aa 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 @@
#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 @@
* 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 @@
#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