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| author | Eric W. Biederman <ebiederm@xmission.com> | 2018-04-15 21:11:06 -0500 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-04-25 10:41:02 -0500 |
| commit | f43a54a0d9168dec3b954dcb1b0b7cd740790739 (patch) | |
| tree | 56ceb22eb8c03ffd970740f0b1a6ad673e82ef01 /arch/mips/mm | |
| parent | 6f467986cf9f2108ca9835e9587e472271b96c30 (diff) | |
| download | linux-f43a54a0d9168dec3b954dcb1b0b7cd740790739.tar.gz | |
signal/mips: Use force_sig_fault where appropriate
Filling in struct siginfo before calling force_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper force_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls force_sig_info. In short about a 5 line reduction in code for every time force_sig_info is called, which makes the calling function clearer. Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@linux-mips.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/mips/mm')
| -rw-r--r-- | arch/mips/mm/fault.c | 19 |
1 files changed, 5 insertions, 14 deletions
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c index 75392becd933..5f71f2b903b7 100644 --- a/arch/mips/mm/fault.c +++ b/arch/mips/mm/fault.c @@ -42,7 +42,7 @@ static void __kprobes __do_page_fault(struct pt_regs *regs, unsigned long write, struct task_struct *tsk = current; struct mm_struct *mm = tsk->mm; const int field = sizeof(unsigned long) * 2; - siginfo_t info; + int si_code; int fault; unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; @@ -63,8 +63,7 @@ static void __kprobes __do_page_fault(struct pt_regs *regs, unsigned long write, return; #endif - clear_siginfo(&info); - info.si_code = SEGV_MAPERR; + si_code = SEGV_MAPERR; /* * We fault-in kernel-space virtual memory on-demand. The @@ -113,7 +112,7 @@ retry: * we can handle it.. */ good_area: - info.si_code = SEGV_ACCERR; + si_code = SEGV_ACCERR; if (write) { if (!(vma->vm_flags & VM_WRITE)) @@ -224,11 +223,7 @@ bad_area_nosemaphore: pr_cont("\n"); } current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f; - info.si_signo = SIGSEGV; - info.si_errno = 0; - /* info.si_code has been set above */ - info.si_addr = (void __user *) address; - force_sig_info(SIGSEGV, &info, tsk); + force_sig_fault(SIGSEGV, si_code, (void __user *)address, tsk); return; } @@ -284,11 +279,7 @@ do_sigbus: #endif current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f; tsk->thread.cp0_badvaddr = address; - info.si_signo = SIGBUS; - info.si_errno = 0; - info.si_code = BUS_ADRERR; - info.si_addr = (void __user *) address; - force_sig_info(SIGBUS, &info, tsk); + force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address, tsk); return; #ifndef CONFIG_64BIT |