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dahdi: Backport try_wait_for_completion() and list_first_entry()

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This allows drivers to use the newer interface but build against older
kernels.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>
This commit is contained in:
Shaun Ruffell 2013-11-11 13:45:20 -06:00
parent abb09a012d
commit 92f1e46b8f
1 changed files with 25 additions and 2 deletions
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23
include/dahdi/kernel.h
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@ -1411,6 +1411,25 @@ static inline void *PDE_DATA(const struct inode *inode)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 31)
#define KERN_CONT ""
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 27)
# ifndef RHEL_RELEASE_VERSION
/* I'm not sure which 5.x release this was backported into. */
static inline int try_wait_for_completion(struct completion *x)
{
unsigned long flags;
int ret = 1;
spin_lock_irqsave(&x->wait.lock, flags);
if (!x->done)
ret = 0;
else
x->done--;
spin_unlock_irqrestore(&x->wait.lock, flags);
return ret;
}
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
@ -1450,6 +1469,9 @@ void dahdi_pci_disable_link_state(struct pci_dev *pdev, int state);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
#define list_first_entry(ptr, type, member) \
list_entry((ptr)->next, type, member)
#ifndef __packed
#define __packed __attribute__((packed))
#endif
@ -1479,6 +1501,7 @@ static inline int strcasecmp(const char *s1, const char *s2)
#endif /* 2.6.22 */
#endif /* 2.6.25 */
#endif /* 2.6.26 */
#endif /* 2.6.27 */
#endif /* 2.6.31 */
#endif /* 3.10.0 */