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ARC: Remove explicit passing around of ECR

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With ECR now part of pt_regs

* No need to propagate from lowest asm handlers as arg
* No need to save it in tsk->thread.cause_code
* Avoid bit chopping to access the bit-fields

More code consolidation, cleanup

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-06-12 15:13:40 +05:30
parent 502a0c775c
commit 38a9ff6d24
13 changed files with 59 additions and 78 deletions
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12
arch/arc/mm/fault.c
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@ -52,15 +52,14 @@ bad_area:
return 1;
}
void do_page_fault(struct pt_regs *regs, unsigned long address,
unsigned long cause_code)
void do_page_fault(struct pt_regs *regs, unsigned long address)
{
struct vm_area_struct *vma = NULL;
struct task_struct *tsk = current;
struct mm_struct *mm = tsk->mm;
siginfo_t info;
int fault, ret;
int write = cause_code & (1 << ECR_C_BIT_DTLB_ST_MISS); /* ST/EX */
int write = regs->ecr_cause & ECR_C_PROTV_STORE; /* ST/EX */
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
(write ? FAULT_FLAG_WRITE : 0);
@ -111,7 +110,8 @@ good_area:
/* Handle protection violation, execute on heap or stack */
if (cause_code == ((ECR_V_PROTV << 16) | ECR_C_PROTV_INST_FETCH))
if ((regs->ecr_vec == ECR_V_PROTV) &&
(regs->ecr_cause == ECR_C_PROTV_INST_FETCH))
goto bad_area;
if (write) {
@ -178,7 +178,6 @@ bad_area_nosemaphore:
/* User mode accesses just cause a SIGSEGV */
if (user_mode(regs)) {
tsk->thread.fault_address = address;
tsk->thread.cause_code = cause_code;
info.si_signo = SIGSEGV;
info.si_errno = 0;
/* info.si_code has been set above */
@ -199,7 +198,7 @@ no_context:
if (fixup_exception(regs))
return;
die("Oops", regs, address, cause_code);
die("Oops", regs, address);
out_of_memory:
if (is_global_init(tsk)) {
@ -220,7 +219,6 @@ do_sigbus:
goto no_context;
tsk->thread.fault_address = address;
tsk->thread.cause_code = cause_code;
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_ADRERR;