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kernel: mips_disable_fpu: initialize fault_addr in fpu_emulator_cop1Handler
Code calling fpu_emulator_cop1Handler will pass on fault_addr, making gcc complain about it not being initialized when the FPU emulator is disabled. Fixes: arch/mips/kernel/traps.c: In function 'do_fpe': arch/mips/kernel/traps.c:864:22: error: 'fault_addr' may be used uninitialized in this function [-Werror=maybe-uninitialized] process_fpemu_return(sig, fault_addr, fcr31); ^ arch/mips/kernel/traps.c: In function 'do_ri': arch/mips/kernel/traps.c:806:22: error: 'fault_addr' may be used uninitialized in this function [-Werror=maybe-uninitialized] process_fpemu_return(sig, fault_addr, fcr31); ^ arch/mips/kernel/traps.c:763:15: note: 'fault_addr' was declared here void __user *fault_addr; ^ arch/mips/kernel/traps.c: In function 'do_cpu': arch/mips/kernel/traps.c:1421:28: error: 'fault_addr' may be used uninitialized in this function [-Werror=maybe-uninitialized] if (!process_fpemu_return(sig, fault_addr, fcr31) && !err) ^ cc1: all warnings being treated as errors make[7]: *** [arch/mips/kernel/traps.o] Error 1 Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 46184
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@ -82,7 +82,7 @@ v2: incorporated changes suggested by Jonas Gorski
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#ifdef CONFIG_DEBUG_FS
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struct mips_fpu_emulator_stats {
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@@ -66,6 +67,20 @@ extern int do_dsemulret(struct pt_regs *
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@@ -66,6 +67,21 @@ extern int do_dsemulret(struct pt_regs *
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extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
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struct mips_fpu_struct *ctx, int has_fpu,
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void *__user *fault_addr);
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@ -96,6 +96,7 @@ v2: incorporated changes suggested by Jonas Gorski
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+ struct mips_fpu_struct *ctx, int has_fpu,
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+ void *__user *fault_addr)
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+{
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+ *fault_addr = NULL;
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+ return SIGILL; /* we don't speak MIPS FPU */
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+}
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+#endif /* CONFIG_MIPS_FPU_EMULATOR */
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