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s390/dumpstack: simplify in stack logic code 

The pattern for all in_<type>_stack() functions is the same; especially
also the size of all stacks is the same. Simplify the code by passing only
the stack address to the generic in_stack() helper, which then can assume a
THREAD_SIZE sized stack.

Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2023-03-27 11:37:21 +02:00 committed by Vasily Gorbik
parent 0f2d4fee91
commit e6badee940
1 changed files with 14 additions and 24 deletions
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38
arch/s390/kernel/dumpstack.c
View File

@ -41,60 +41,50 @@ const char *stack_type_name(enum stack_type type)
EXPORT_SYMBOL_GPL(stack_type_name);
static inline bool in_stack(unsigned long sp, struct stack_info *info,
enum stack_type type, unsigned long low,
unsigned long high)
enum stack_type type, unsigned long stack)
{
if (sp < low || sp >= high)
if (sp < stack || sp >= stack + THREAD_SIZE)
return false;
info->type = type;
info->begin = low;
info->end = high;
info->begin = stack;
info->end = stack + THREAD_SIZE;
return true;
}
static bool in_task_stack(unsigned long sp, struct task_struct *task,
struct stack_info *info)
{
unsigned long stack;
unsigned long stack = (unsigned long)task_stack_page(task);
stack = (unsigned long) task_stack_page(task);
return in_stack(sp, info, STACK_TYPE_TASK, stack, stack + THREAD_SIZE);
return in_stack(sp, info, STACK_TYPE_TASK, stack);
}
static bool in_irq_stack(unsigned long sp, struct stack_info *info)
{
unsigned long frame_size, top;
unsigned long stack = S390_lowcore.async_stack - STACK_INIT_OFFSET;
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
top = S390_lowcore.async_stack + frame_size;
return in_stack(sp, info, STACK_TYPE_IRQ, top - THREAD_SIZE, top);
return in_stack(sp, info, STACK_TYPE_IRQ, stack);
}
static bool in_nodat_stack(unsigned long sp, struct stack_info *info)
{
unsigned long frame_size, top;
unsigned long stack = S390_lowcore.nodat_stack - STACK_INIT_OFFSET;
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
top = S390_lowcore.nodat_stack + frame_size;
return in_stack(sp, info, STACK_TYPE_NODAT, top - THREAD_SIZE, top);
return in_stack(sp, info, STACK_TYPE_NODAT, stack);
}
static bool in_mcck_stack(unsigned long sp, struct stack_info *info)
{
unsigned long frame_size, top;
unsigned long stack = S390_lowcore.mcck_stack - STACK_INIT_OFFSET;
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
top = S390_lowcore.mcck_stack + frame_size;
return in_stack(sp, info, STACK_TYPE_MCCK, top - THREAD_SIZE, top);
return in_stack(sp, info, STACK_TYPE_MCCK, stack);
}
static bool in_restart_stack(unsigned long sp, struct stack_info *info)
{
unsigned long frame_size, top;
unsigned long stack = S390_lowcore.restart_stack - STACK_INIT_OFFSET;
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
top = S390_lowcore.restart_stack + frame_size;
return in_stack(sp, info, STACK_TYPE_RESTART, top - THREAD_SIZE, top);
return in_stack(sp, info, STACK_TYPE_RESTART, stack);
}
int get_stack_info(unsigned long sp, struct task_struct *task,