X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fpercpu.c;h=6e09741ddc628bf53f4efc338fb4d2636b1b473e;hb=06ee772043c7ad125f2c2e6a08dc563706f39e8d;hp=768419d44ad7b2b80e38b49927965b191a2f7704;hpb=12ff4bf58b64ad3b8fb8e27889c99dcd5aa6fb0b;p=pandora-kernel.git

diff --git a/mm/percpu.c b/mm/percpu.c
index 768419d44ad7..6e09741ddc62 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1303,6 +1303,32 @@ 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