Eric Lee / linux-smarc-t335x-v3.2

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Commit 41ca28ab2abd76dc203e2c3a7cd609607cb927c3

Authored by Evgeniy Polyakov
Committed by Greg Kroah-Hartman
1 parent 775b64d2b6
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

kref: add kref_set() 

This adds kref_set() to the kref api for future use by people who really
know what they are doing with krefs...

From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Showing 2 changed files with 14 additions and 2 deletions Side-by-side Diff

include/linux/kref.h
Diff comments   View file @ 41ca28a
... ... @@ -24,6 +24,7 @@
24 24 atomic_t refcount;
25 25 };
26 26  
  27 +void kref_set(struct kref *kref, int num);
27 28 void kref_init(struct kref *kref);
28 29 void kref_get(struct kref *kref);
29 30 int kref_put(struct kref *kref, void (*release) (struct kref *kref));
... ... @@ -15,13 +15,23 @@
15 15 #include <linux/module.h>
16 16  
17 17 /**
  18 + * kref_set - initialize object and set refcount to requested number.
  19 + * @kref: object in question.
  20 + * @num: initial reference counter
  21 + */
  22 +void kref_set(struct kref *kref, int num)
  23 +{
  24 + atomic_set(&kref->refcount, num);
  25 + smp_mb();
  26 +}
  27 +
  28 +/**
18 29 * kref_init - initialize object.
19 30 * @kref: object in question.
20 31 */
21 32 void kref_init(struct kref *kref)
22 33 {
23   - atomic_set(&kref->refcount,1);
24   - smp_mb();
  34 + kref_set(kref, 1);
25 35 }
26 36  
27 37 /**
... ... @@ -61,6 +71,7 @@
61 71 return 0;
62 72 }
63 73  
  74 +EXPORT_SYMBOL(kref_set);
64 75 EXPORT_SYMBOL(kref_init);
65 76 EXPORT_SYMBOL(kref_get);
66 77 EXPORT_SYMBOL(kref_put);