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-rw-r--r--kernel/module.c64
1 files changed, 49 insertions, 15 deletions
diff --git a/kernel/module.c b/kernel/module.c
index 7767223..f77ac32 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -51,6 +51,7 @@
#include <linux/tracepoint.h>
#include <linux/ftrace.h>
#include <linux/async.h>
+#include <linux/percpu.h>
#if 0
#define DEBUGP printk
@@ -366,6 +367,34 @@ static struct module *find_module(const char *name)
}
#ifdef CONFIG_SMP
+
+#ifdef CONFIG_HAVE_DYNAMIC_PER_CPU_AREA
+
+static void *percpu_modalloc(unsigned long size, unsigned long align,
+ const char *name)
+{
+ void *ptr;
+
+ if (align > PAGE_SIZE) {
+ printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n",
+ name, align, PAGE_SIZE);
+ align = PAGE_SIZE;
+ }
+
+ ptr = __alloc_reserved_percpu(size, align);
+ if (!ptr)
+ printk(KERN_WARNING
+ "Could not allocate %lu bytes percpu data\n", size);
+ return ptr;
+}
+
+static void percpu_modfree(void *freeme)
+{
+ free_percpu(freeme);
+}
+
+#else /* ... !CONFIG_HAVE_DYNAMIC_PER_CPU_AREA */
+
/* Number of blocks used and allocated. */
static unsigned int pcpu_num_used, pcpu_num_allocated;
/* Size of each block. -ve means used. */
@@ -480,21 +509,6 @@ static void percpu_modfree(void *freeme)
}
}
-static unsigned int find_pcpusec(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- const char *secstrings)
-{
- return find_sec(hdr, sechdrs, secstrings, ".data.percpu");
-}
-
-static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size)
-{
- int cpu;
-
- for_each_possible_cpu(cpu)
- memcpy(pcpudest + per_cpu_offset(cpu), from, size);
-}
-
static int percpu_modinit(void)
{
pcpu_num_used = 2;
@@ -513,7 +527,26 @@ static int percpu_modinit(void)
return 0;
}
__initcall(percpu_modinit);
+
+#endif /* CONFIG_HAVE_DYNAMIC_PER_CPU_AREA */
+
+static unsigned int find_pcpusec(Elf_Ehdr *hdr,
+ Elf_Shdr *sechdrs,
+ const char *secstrings)
+{
+ return find_sec(hdr, sechdrs, secstrings, ".data.percpu");
+}
+
+static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size)
+{
+ int cpu;
+
+ for_each_possible_cpu(cpu)
+ memcpy(pcpudest + per_cpu_offset(cpu), from, size);
+}
+
#else /* ... !CONFIG_SMP */
+
static inline void *percpu_modalloc(unsigned long size, unsigned long align,
const char *name)
{
@@ -535,6 +568,7 @@ static inline void percpu_modcopy(void *pcpudst, const void *src,
/* pcpusec should be 0, and size of that section should be 0. */
BUG_ON(size != 0);
}
+
#endif /* CONFIG_SMP */
#define MODINFO_ATTR(field) \
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