signal/c6x: 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: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <jacquiot.aurelien@gmail.com>
Cc: linux-c6x-dev@linux-c6x.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

diff --git a/arch/c6x/kernel/traps.c b/arch/c6x/kernel/traps.c
index c5feee4..5c60aea 100644 (file)
--- a/arch/c6x/kernel/traps.c
+++ b/arch/c6x/kernel/traps.c
@@ -244,9 +244,7 @@ static struct exception_info eexcept_table[128] = {
 static void do_trap(struct exception_info *except_info, struct pt_regs *regs)
 {
        unsigned long addr = instruction_pointer(regs);
-       siginfo_t info;
 
-       clear_siginfo(&info);
        if (except_info->code != TRAP_BRKPT)
                pr_err("TRAP: %s PC[0x%lx] signo[%d] code[%d]\n",
                       except_info->kernel_str, regs->pc,
@@ -254,12 +252,8 @@ static void do_trap(struct exception_info *except_info, struct pt_regs *regs)
 
        die_if_kernel(except_info->kernel_str, regs, addr);
 
-       info.si_signo = except_info->signo;
-       info.si_errno = 0;
-       info.si_code  = except_info->code;
-       info.si_addr  = (void __user *)addr;
-
-       force_sig_info(except_info->signo, &info, current);
+       force_sig_fault(except_info->signo, except_info->code,
+                       (void __user *)addr, current);
 }
 
 /*