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signal/alpha: Replace FPE_FIXME with FPE_FLTUNK

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Using an si_code of 0 that aliases with SI_USER is clearly the wrong
thing todo, and causes problems in interesting ways.

The newly defined FPE_FLTUNK semantically appears to fit the bill so
use it instead.

Given recent experience in this area odds are it will not break
anything.  Fixing it removes a hazard to kernel maintenance.

Cc: Helge Deller <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: [email protected]
History Tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git
Fixes: 0a635c7a84cf ("Fill in siginfo_t.")
Signed-off-by: "Eric W. Biederman" <[email protected]>
This commit is contained in:
Eric W. Biederman 2018-04-17 16:04:57 -05:00
commit 4cc13e4f6d
3 changed files with 2 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

7
arch/alpha/include/uapi/asm/siginfo.h
View file

@ -7,13 +7,6 @@
#include <asm-generic/siginfo.h>
/*
* SIGFPE si_codes
*/
#ifdef __KERNEL__
#define FPE_FIXME 0 /* Broken dup of SI_USER */
#endif /* __KERNEL__ */
/*
* SIGTRAP si_codes
*/

2
arch/alpha/kernel/osf_sys.c
View file

@ -872,7 +872,7 @@ SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
if (fex) {
siginfo_t info;
int si_code = FPE_FIXME;
int si_code = FPE_FLTUNK;
if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;

2
arch/alpha/kernel/traps.c
View file

@ -328,7 +328,7 @@ do_entIF(unsigned long type, struct pt_regs *regs)
break;
case GEN_ROPRAND:
signo = SIGFPE;
code = FPE_FIXME;
code = FPE_FLTUNK;
break;
case GEN_DECOVF: