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signal/arm64: Expand __do_user_fault and remove it 

Not all of the signals passed to __do_user_fault can be handled
the same way so expand the now tiny __do_user_fault in it's callers
and remove it.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2018-09-22 10:05:41 +02:00
parent aefab2b4c0
commit effb093ad2
1 changed files with 8 additions and 10 deletions
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18
arch/arm64/mm/fault.c
View File

@ -354,12 +354,6 @@ static void set_thread_esr(unsigned long address, unsigned int esr)
current->thread.fault_code = esr;
}
static void __do_user_fault(struct siginfo *info, unsigned int esr)
{
set_thread_esr((unsigned long)info->si_addr, esr);
arm64_force_sig_info(info, esr_to_fault_info(esr)->name);
}
static void do_bad_area(unsigned long addr, unsigned int esr, struct pt_regs *regs)
{
/*
@ -375,7 +369,8 @@ static void do_bad_area(unsigned long addr, unsigned int esr, struct pt_regs *re
si.si_code = inf->code;
si.si_addr = (void __user *)addr;
__do_user_fault(&si, esr);
set_thread_esr(addr, esr);
arm64_force_sig_info(&si, inf->name);
} else {
__do_kernel_fault(addr, esr, regs);
}
@ -576,7 +571,8 @@ retry:
si.si_signo = SIGBUS;
si.si_code = BUS_ADRERR;
si.si_addr = (void __user *)addr;
__do_user_fault(&si, esr);
set_thread_esr(addr, esr);
arm64_force_sig_info(&si, esr_to_fault_info(esr)->name);
} else if (fault & (VM_FAULT_HWPOISON_LARGE | VM_FAULT_HWPOISON)) {
unsigned int lsb;
@ -589,7 +585,8 @@ retry:
si.si_code = BUS_MCEERR_AR;
si.si_addr = (void __user *)addr;
si.si_addr_lsb = lsb;
__do_user_fault(&si, esr);
set_thread_esr(addr, esr);
arm64_force_sig_info(&si, esr_to_fault_info(esr)->name);
} else {
/*
* Something tried to access memory that isn't in our memory
@ -600,7 +597,8 @@ retry:
si.si_code = fault == VM_FAULT_BADACCESS ?
SEGV_ACCERR : SEGV_MAPERR;
si.si_addr = (void __user *)addr;
__do_user_fault(&si, esr);
set_thread_esr(addr, esr);
arm64_force_sig_info(&si, esr_to_fault_info(esr)->name);
}
return 0;