diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2011-05-28 15:27:59 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2011-07-20 23:12:10 +0100 |
| commit | 852fe3105e94ca26d1b3df7e2cb6878ebdd67608 (patch) | |
| tree | b38949922e762e4310b105eec24a9df5352804e4 /arch/mips/include | |
| parent | b12acf163f6e52ff7d41aca51382dde17c506068 (diff) | |
MIPS: Malta: Fix crash in SMP kernel on non-CMP systems.
Since 6be63bbbdab66b9185dc6f67c8b1bacb6f37f946 (lmo) rsp.
af3a1f6f4813907e143f87030cde67a9971db533 (kernel.org) the Malta code does
no longer probe for presence of GCMP if CMP is not configured. This means
that the variable gcmp_present well be left at its default value of -1
which normally is meant to indicate that GCMP has not yet been mmapped.
This non-zero value is now interpreted as GCMP being present resulting
in a write attempt to a GCMP register resulting in a crash.
Reported and a build fix on top of my fix by Rob Landley <rob@landley.net>.
Reported-by: Rob Landley <rob@landley.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/2413/
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/smp-ops.h | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/arch/mips/include/asm/smp-ops.h b/arch/mips/include/asm/smp-ops.h index 9e09af34c8a..48b03fff31e 100644 --- a/arch/mips/include/asm/smp-ops.h +++ b/arch/mips/include/asm/smp-ops.h @@ -56,8 +56,43 @@ static inline void register_smp_ops(struct plat_smp_ops *ops) #endif /* !CONFIG_SMP */ -extern struct plat_smp_ops up_smp_ops; -extern struct plat_smp_ops cmp_smp_ops; -extern struct plat_smp_ops vsmp_smp_ops; +static inline int register_up_smp_ops(void) +{ +#ifdef CONFIG_SMP_UP + extern struct plat_smp_ops up_smp_ops; + + register_smp_ops(&up_smp_ops); + + return 0; +#else + return -ENODEV; +#endif +} + +static inline int register_cmp_smp_ops(void) +{ +#ifdef CONFIG_MIPS_CMP + extern struct plat_smp_ops cmp_smp_ops; + + register_smp_ops(&cmp_smp_ops); + + return 0; +#else + return -ENODEV; +#endif +} + +static inline int register_vsmp_smp_ops(void) +{ +#ifdef CONFIG_MIPS_MT_SMP + extern struct plat_smp_ops vsmp_smp_ops; + + register_smp_ops(&vsmp_smp_ops); + + return 0; +#else + return -ENODEV; +#endif +} #endif /* __ASM_SMP_OPS_H */ |