diff options
Diffstat (limited to 'kernel/module.c')
-rw-r--r-- | kernel/module.c | 66 |
1 files changed, 50 insertions, 16 deletions
diff --git a/kernel/module.c b/kernel/module.c index ba22484a987e..8b742f2b3845 100644 --- a/kernel/module.c +++ b/kernel/module.c | |||
@@ -51,6 +51,7 @@ | |||
51 | #include <linux/tracepoint.h> | 51 | #include <linux/tracepoint.h> |
52 | #include <linux/ftrace.h> | 52 | #include <linux/ftrace.h> |
53 | #include <linux/async.h> | 53 | #include <linux/async.h> |
54 | #include <linux/percpu.h> | ||
54 | 55 | ||
55 | #if 0 | 56 | #if 0 |
56 | #define DEBUGP printk | 57 | #define DEBUGP printk |
@@ -366,6 +367,34 @@ static struct module *find_module(const char *name) | |||
366 | } | 367 | } |
367 | 368 | ||
368 | #ifdef CONFIG_SMP | 369 | #ifdef CONFIG_SMP |
370 | |||
371 | #ifdef CONFIG_HAVE_DYNAMIC_PER_CPU_AREA | ||
372 | |||
373 | static void *percpu_modalloc(unsigned long size, unsigned long align, | ||
374 | const char *name) | ||
375 | { | ||
376 | void *ptr; | ||
377 | |||
378 | if (align > PAGE_SIZE) { | ||
379 | printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n", | ||
380 | name, align, PAGE_SIZE); | ||
381 | align = PAGE_SIZE; | ||
382 | } | ||
383 | |||
384 | ptr = __alloc_reserved_percpu(size, align); | ||
385 | if (!ptr) | ||
386 | printk(KERN_WARNING | ||
387 | "Could not allocate %lu bytes percpu data\n", size); | ||
388 | return ptr; | ||
389 | } | ||
390 | |||
391 | static void percpu_modfree(void *freeme) | ||
392 | { | ||
393 | free_percpu(freeme); | ||
394 | } | ||
395 | |||
396 | #else /* ... !CONFIG_HAVE_DYNAMIC_PER_CPU_AREA */ | ||
397 | |||
369 | /* Number of blocks used and allocated. */ | 398 | /* Number of blocks used and allocated. */ |
370 | static unsigned int pcpu_num_used, pcpu_num_allocated; | 399 | static unsigned int pcpu_num_used, pcpu_num_allocated; |
371 | /* Size of each block. -ve means used. */ | 400 | /* Size of each block. -ve means used. */ |
@@ -480,21 +509,6 @@ static void percpu_modfree(void *freeme) | |||
480 | } | 509 | } |
481 | } | 510 | } |
482 | 511 | ||
483 | static unsigned int find_pcpusec(Elf_Ehdr *hdr, | ||
484 | Elf_Shdr *sechdrs, | ||
485 | const char *secstrings) | ||
486 | { | ||
487 | return find_sec(hdr, sechdrs, secstrings, ".data.percpu"); | ||
488 | } | ||
489 | |||
490 | static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size) | ||
491 | { | ||
492 | int cpu; | ||
493 | |||
494 | for_each_possible_cpu(cpu) | ||
495 | memcpy(pcpudest + per_cpu_offset(cpu), from, size); | ||
496 | } | ||
497 | |||
498 | static int percpu_modinit(void) | 512 | static int percpu_modinit(void) |
499 | { | 513 | { |
500 | pcpu_num_used = 2; | 514 | pcpu_num_used = 2; |
@@ -513,7 +527,26 @@ static int percpu_modinit(void) | |||
513 | return 0; | 527 | return 0; |
514 | } | 528 | } |
515 | __initcall(percpu_modinit); | 529 | __initcall(percpu_modinit); |
530 | |||
531 | #endif /* CONFIG_HAVE_DYNAMIC_PER_CPU_AREA */ | ||
532 | |||
533 | static unsigned int find_pcpusec(Elf_Ehdr *hdr, | ||
534 | Elf_Shdr *sechdrs, | ||
535 | const char *secstrings) | ||
536 | { | ||
537 | return find_sec(hdr, sechdrs, secstrings, ".data.percpu"); | ||
538 | } | ||
539 | |||
540 | static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size) | ||
541 | { | ||
542 | int cpu; | ||
543 | |||
544 | for_each_possible_cpu(cpu) | ||
545 | memcpy(pcpudest + per_cpu_offset(cpu), from, size); | ||
546 | } | ||
547 | |||
516 | #else /* ... !CONFIG_SMP */ | 548 | #else /* ... !CONFIG_SMP */ |
549 | |||
517 | static inline void *percpu_modalloc(unsigned long size, unsigned long align, | 550 | static inline void *percpu_modalloc(unsigned long size, unsigned long align, |
518 | const char *name) | 551 | const char *name) |
519 | { | 552 | { |
@@ -535,6 +568,7 @@ static inline void percpu_modcopy(void *pcpudst, const void *src, | |||
535 | /* pcpusec should be 0, and size of that section should be 0. */ | 568 | /* pcpusec should be 0, and size of that section should be 0. */ |
536 | BUG_ON(size != 0); | 569 | BUG_ON(size != 0); |
537 | } | 570 | } |
571 | |||
538 | #endif /* CONFIG_SMP */ | 572 | #endif /* CONFIG_SMP */ |
539 | 573 | ||
540 | #define MODINFO_ATTR(field) \ | 574 | #define MODINFO_ATTR(field) \ |
@@ -2735,7 +2769,7 @@ int is_module_address(unsigned long addr) | |||
2735 | 2769 | ||
2736 | 2770 | ||
2737 | /* Is this a valid kernel address? */ | 2771 | /* Is this a valid kernel address? */ |
2738 | __notrace_funcgraph struct module *__module_text_address(unsigned long addr) | 2772 | struct module *__module_text_address(unsigned long addr) |
2739 | { | 2773 | { |
2740 | struct module *mod; | 2774 | struct module *mod; |
2741 | 2775 | ||