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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-03 11:42:58 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-20 16:08:26 +0100 |
| commit | bbc3d14e9aca023bb98e580aa1c9350af8effdb1 (patch) | |
| tree | d4b70bc67c04d1cbe05948a9368f916198237dbc /arch/arm/mach-ux500 | |
| parent | ARM: SMP: ensure smp_send_stop() waits for CPUs to stop (diff) | |
| download | linux-bbc3d14e9aca023bb98e580aa1c9350af8effdb1.tar.xz linux-bbc3d14e9aca023bb98e580aa1c9350af8effdb1.zip | |
ARM: SMP: move CPU number sanity checks to smp_init_cpus()
Ensure that the number of CPUs is sanity checked before setting
the number of possible CPUs. This avoids any chance of overflowing
the cpu_possible bitmap.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-ux500')
| -rw-r--r-- | arch/arm/mach-ux500/platsmp.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/arch/arm/mach-ux500/platsmp.c b/arch/arm/mach-ux500/platsmp.c index b8987bd21249..a51962b7579b 100644 --- a/arch/arm/mach-ux500/platsmp.c +++ b/arch/arm/mach-ux500/platsmp.c @@ -128,16 +128,6 @@ void __init smp_init_cpus(void) { unsigned int i, ncores = get_core_count(); - for (i = 0; i < ncores; i++) - set_cpu_possible(i, true); -} - -void __init smp_prepare_cpus(unsigned int max_cpus) -{ - unsigned int ncores = get_core_count(); - unsigned int cpu = smp_processor_id(); - int i; - /* sanity check */ if (ncores == 0) { printk(KERN_ERR @@ -145,14 +135,24 @@ void __init smp_prepare_cpus(unsigned int max_cpus) ncores = 1; } - if (ncores > num_possible_cpus()) { + if (ncores > NR_CPUS) { printk(KERN_WARNING "U8500: no. of cores (%d) greater than configured " "maximum of %d - clipping\n", - ncores, num_possible_cpus()); - ncores = num_possible_cpus(); + ncores, NR_CPUS); + ncores = NR_CPUS; } + for (i = 0; i < ncores; i++) + set_cpu_possible(i, true); +} + +void __init smp_prepare_cpus(unsigned int max_cpus) +{ + unsigned int ncores = num_possible_cpus(); + unsigned int cpu = smp_processor_id(); + int i; + smp_store_cpu_info(cpu); /* |