Commit 559f9008 authored Aug 01, 2017 by Eric W. Biederman

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>

parent e4d90ee3

arch/c6x/kernel/traps.c

+2 −8

Original line number	Diff line number	Diff line
		@@ -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);
		}

		/*