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signal/sparc: Use force_sig_fault where appropriate

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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: David Miller <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2018-04-19 16:59:56 -05:00
parent 0e3d9f1e66
commit d1f5bef63f
7 changed files with 37 additions and 178 deletions
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10
arch/sparc/kernel/process_64.c
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@@ -518,15 +518,7 @@ void synchronize_user_stack(void)
static void stack_unaligned(unsigned long sp)
{
siginfo_t info;
clear_siginfo(&info);
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = BUS_ADRALN;
info.si_addr = (void __user *) sp;
info.si_trapno = 0;
force_sig_info(SIGBUS, &info, current);
force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) sp, 0, current);
}
void fault_in_user_windows(void)