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[S390] cleanup trap handling

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Move the program interruption code and the translation exception identifier
to the pt_regs structure as 'int_code' and 'int_parm_long' and make the
first level interrupt handler in entry[64].S store the two values. That
makes it possible to drop 'prot_addr' and 'trap_no' from the thread_struct
and to reduce the number of arguments to a lot of functions. Finally
un-inline do_trap. Overall this saves 5812 bytes in the .text section of
the 64 bit kernel.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2011-12-27 11:27:18 +01:00
parent 679e2ea733
commit aa33c8cbba
12 changed files with 158 additions and 210 deletions
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10
arch/s390/kernel/entry.h
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@ -6,15 +6,15 @@
#include <asm/ptrace.h>
extern void (*pgm_check_table[128])(struct pt_regs *, long, unsigned long);
extern void (*pgm_check_table[128])(struct pt_regs *);
extern void *restart_stack;
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
asmlinkage void do_syscall_trace_exit(struct pt_regs *regs);
void do_protection_exception(struct pt_regs *, long, unsigned long);
void do_dat_exception(struct pt_regs *, long, unsigned long);
void do_asce_exception(struct pt_regs *, long, unsigned long);
void do_protection_exception(struct pt_regs *regs);
void do_dat_exception(struct pt_regs *regs);
void do_asce_exception(struct pt_regs *regs);
void do_per_trap(struct pt_regs *regs);
void syscall_trace(struct pt_regs *regs, int entryexit);
@ -28,7 +28,7 @@ void do_extint(struct pt_regs *regs, unsigned int, unsigned int, unsigned long);
void do_restart(void);
int __cpuinit start_secondary(void *cpuvoid);
void __init startup_init(void);
void die(const char * str, struct pt_regs * regs, long err);
void die(struct pt_regs *regs, const char *str);
void __init time_init(void);