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| author | Ralf Baechle <ralf@linux-mips.org> | 2006-02-23 13:23:27 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2006-02-27 18:30:36 +0100 |
| commit | 9b6695a8adfe0916e81ddd810a5b9db3eb8b0e46 (patch) | |
| tree | 62ba9475530c88ccf2149cd58eabd97ebe096aca /include/asm-mips | |
| parent | [MIPS] Use "=R" constraint to avoid compiler errors in cmpxchg(). (diff) | |
| download | linux-9b6695a8adfe0916e81ddd810a5b9db3eb8b0e46.tar.xz linux-9b6695a8adfe0916e81ddd810a5b9db3eb8b0e46.zip | |
[MIPS] SMP: Fix initialization order bug.
A recent change requires cpu_possible_map to be initialized before
smp_sched_init() but most MIPS platforms were initializing their
processors in the prom_prepare_cpus callback of smp_prepare_cpus. The
simple fix of calling prom_prepare_cpus from one of the earlier SMP
initialization hooks doesn't work well either since IPIs may require
init_IRQ() to have completed, so bit the bullet and split
prom_prepare_cpus into two initialization functions, plat_smp_setup
which is called early from setup_arch and plat_prepare_cpus called where
prom_prepare_cpus used to be called.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips')
| -rw-r--r-- | include/asm-mips/smp.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/asm-mips/smp.h b/include/asm-mips/smp.h index 5618f1e12f40..75c6fe7c2126 100644 --- a/include/asm-mips/smp.h +++ b/include/asm-mips/smp.h @@ -58,7 +58,9 @@ static inline int num_booting_cpus(void) return cpus_weight(cpu_callout_map); } -/* These are defined by the board-specific code. */ +/* + * These are defined by the board-specific code. + */ /* * Cause the function described by call_data to be executed on the passed @@ -79,7 +81,12 @@ extern void prom_boot_secondary(int cpu, struct task_struct *idle); extern void prom_init_secondary(void); /* - * Detect available CPUs, populate phys_cpu_present_map before smp_init + * Populate cpu_possible_map before smp_init, called from setup_arch. + */ +extern void plat_smp_setup(void); + +/* + * Called after init_IRQ but before __cpu_up. */ extern void prom_prepare_cpus(unsigned int max_cpus); |