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author | Thomas Gleixner <tglx@linutronix.de> | 2010-04-13 14:12:17 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2010-04-13 14:12:17 +0200 |
commit | 7c7145f6acc68100dbdc5d3c5c64fe3af1c99c89 (patch) | |
tree | 5e93e3eb4787229032f1df222fa490112f4b0c32 /mm/percpu.c | |
parent | 92d6b71ab906be706f3679353b30a8d2c3831144 (diff) | |
parent | 0d0fb0f9c5fddef4a10242fe3337f00f528a3099 (diff) |
Merge branch 'linus' into irq/core
Reason: Get the upstream IRQF_DISABLED related changes.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'mm/percpu.c')
-rw-r--r-- | mm/percpu.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index 768419d44ad..6e09741ddc6 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -1304,6 +1304,32 @@ void free_percpu(void __percpu *ptr) EXPORT_SYMBOL_GPL(free_percpu); /** + * is_kernel_percpu_address - test whether address is from static percpu area + * @addr: address to test + * + * Test whether @addr belongs to in-kernel static percpu area. Module + * static percpu areas are not considered. For those, use + * is_module_percpu_address(). + * + * RETURNS: + * %true if @addr is from in-kernel static percpu area, %false otherwise. + */ +bool is_kernel_percpu_address(unsigned long addr) +{ + const size_t static_size = __per_cpu_end - __per_cpu_start; + void __percpu *base = __addr_to_pcpu_ptr(pcpu_base_addr); + unsigned int cpu; + + for_each_possible_cpu(cpu) { + void *start = per_cpu_ptr(base, cpu); + + if ((void *)addr >= start && (void *)addr < start + static_size) + return true; + } + return false; +} + +/** * per_cpu_ptr_to_phys - convert translated percpu address to physical address * @addr: the address to be converted to physical address * |