diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2013-11-20 11:05:01 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-11-21 10:33:44 +1100 |
| commit | 3eb906c6b6c123513718e7742a96a4189f900382 (patch) | |
| tree | 116cb8384e74dd0e6466172f87dd309a9a85e0ce | |
| parent | c6102609289de268bcc6093e606483ea8bb35c84 (diff) | |
| download | linux-3eb906c6b6c123513718e7742a96a4189f900382.tar.bz2 | |
powerpc: Make cpu_to_chip_id() available when SMP=n
Up until now we have only used cpu_to_chip_id() in the topology code,
which is only used on SMP builds. However my recent commit a4da0d5
"Implement arch_get_random_long/int() for powernv" added a usage when
SMP=n, breaking the build.
Move cpu_to_chip_id() into prom.c so it is available for SMP=n builds.
We would move the extern to prom.h, but that breaks the include in
topology.h. Instead we leave it in smp.h, but move it out of the
CONFIG_SMP #ifdef. We also need to include asm/smp.h in rng.c, because
the linux version skips asm/smp.h on UP. What a mess.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/include/asm/smp.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 20 | ||||
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 16 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/rng.c | 1 |
4 files changed, 22 insertions, 17 deletions
diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h index 98da78e0c2c0..084e0807db98 100644 --- a/arch/powerpc/include/asm/smp.h +++ b/arch/powerpc/include/asm/smp.h @@ -33,6 +33,7 @@ extern int boot_cpuid; extern int spinning_secondaries; extern void cpu_die(void); +extern int cpu_to_chip_id(int cpu); #ifdef CONFIG_SMP @@ -112,7 +113,6 @@ static inline struct cpumask *cpu_core_mask(int cpu) } extern int cpu_to_core_id(int cpu); -extern int cpu_to_chip_id(int cpu); /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. * diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index f3a47098fb8e..fa0ad8aafbcc 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -777,6 +777,26 @@ int of_get_ibm_chip_id(struct device_node *np) return -1; } +/** + * cpu_to_chip_id - Return the cpus chip-id + * @cpu: The logical cpu number. + * + * Return the value of the ibm,chip-id property corresponding to the given + * logical cpu number. If the chip-id can not be found, returns -1. + */ +int cpu_to_chip_id(int cpu) +{ + struct device_node *np; + + np = of_get_cpu_node(cpu, NULL); + if (!np) + return -1; + + of_node_put(np); + return of_get_ibm_chip_id(np); +} +EXPORT_SYMBOL(cpu_to_chip_id); + #ifdef CONFIG_PPC_PSERIES /* * Fix up the uninitialized fields in a new device node: diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 930cd8af3503..a3b64f3bf9a2 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -597,22 +597,6 @@ out: return id; } -/* Return the value of the chip-id property corresponding - * to the given logical cpu. - */ -int cpu_to_chip_id(int cpu) -{ - struct device_node *np; - - np = of_get_cpu_node(cpu, NULL); - if (!np) - return -1; - - of_node_put(np); - return of_get_ibm_chip_id(np); -} -EXPORT_SYMBOL(cpu_to_chip_id); - /* Helper routines for cpu to core mapping */ int cpu_core_index_of_thread(int cpu) { diff --git a/arch/powerpc/platforms/powernv/rng.c b/arch/powerpc/platforms/powernv/rng.c index 8844628915dc..1cb160dc1609 100644 --- a/arch/powerpc/platforms/powernv/rng.c +++ b/arch/powerpc/platforms/powernv/rng.c @@ -19,6 +19,7 @@ #include <asm/io.h> #include <asm/prom.h> #include <asm/machdep.h> +#include <asm/smp.h> struct powernv_rng { |