diff options
author | Dominik Sliwa <dominik.sliwa@toradex.com> | 2017-07-04 11:53:51 +0200 |
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committer | Dominik Sliwa <dominik.sliwa@toradex.com> | 2017-08-21 17:21:16 +0200 |
commit | 84d6642e4d1609562abb421341c9a90c023247a1 (patch) | |
tree | ffcc2b23e887c7d5615303067978e185e67072cc /drivers/net/wireless/intel/iwlwifi | |
parent | 52409fae3e4b8d16b68b61902fc09075cd97b75d (diff) |
backports:fix compilation with toradex kernels
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi')
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c index de94dfd..971499c 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -37,6 +37,32 @@ #include "internal.h" #include "iwl-op-mode.h" + #if LINUX_VERSION_IS_LESS(3,7,0) +/* + * atomic_dec_if_positive - decrement by 1 if old value positive + * @v: pointer of type atomic_t + * + * The function returns the old value of *v minus 1, even if + * the atomic variable, v, was not decremented. + */ +#ifndef atomic_dec_if_positive +static inline int atomic_dec_if_positive(atomic_t *v) +{ + int c, old, dec; + c = atomic_read(v); + for (;;) { + dec = c - 1; + if (unlikely(dec < 0)) + break; + old = atomic_cmpxchg((v), c, dec); + if (likely(old == c)) + break; + c = old; + } + return dec; +} +#endif +#endif /****************************************************************************** * * RX path functions |