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signal/ia64: 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: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
Fixes: 987159266c45 ("Linux version 2.3.48")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2018-04-17 15:45:30 -05:00
parent 4cc13e4f6d
commit 51dd709fee
2 changed files with 2 additions and 9 deletions
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7
arch/ia64/include/uapi/asm/siginfo.h
View File

@ -27,11 +27,4 @@
#define __ISR_VALID_BIT 0
#define __ISR_VALID (1 << __ISR_VALID_BIT)
/*
* SIGFPE si_codes
*/
#ifdef __KERNEL__
#define FPE_FIXME 0 /* Broken dup of SI_USER */
#endif /* __KERNEL__ */
#endif /* _UAPI_ASM_IA64_SIGINFO_H */

4
arch/ia64/kernel/traps.c
View File

@ -353,7 +353,7 @@ handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
clear_siginfo(&siginfo);
siginfo.si_signo = SIGFPE;
siginfo.si_errno = 0;
siginfo.si_code = FPE_FIXME; /* default code */
siginfo.si_code = FPE_FLTUNK; /* default code */
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
if (isr & 0x11) {
siginfo.si_code = FPE_FLTINV;
@ -380,7 +380,7 @@ handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
clear_siginfo(&siginfo);
siginfo.si_signo = SIGFPE;
siginfo.si_errno = 0;
siginfo.si_code = FPE_FIXME; /* default code */
siginfo.si_code = FPE_FLTUNK; /* default code */
siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri);
if (isr & 0x880) {
siginfo.si_code = FPE_FLTOVF;