[NETFILTER]: nf_conntrack/nf_nat: add TFTP helper port

[linux-2.6-omap-h63xx.git] / include / asm-mips / spinlock.h

diff --git a/include/asm-mips/spinlock.h b/include/asm-mips/spinlock.h
index 669b8e349ff29544fce6a35c91307950ba660f4a..c8d5587467bbf6181ba2950fa66bf63c8dcc3858 100644 (file)
--- a/include/asm-mips/spinlock.h
+++ b/include/asm-mips/spinlock.h
@@ -239,7 +239,51 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw)
        : "memory");
 }
 
-#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
+static inline int __raw_read_trylock(raw_rwlock_t *rw)
+{
+       unsigned int tmp;
+       int ret;
+
+       if (R10000_LLSC_WAR) {
+               __asm__ __volatile__(
+               "       .set    noreorder       # __raw_read_trylock    \n"
+               "       li      %2, 0                                   \n"
+               "1:     ll      %1, %3                                  \n"
+               "       bnez    %1, 2f                                  \n"
+               "        addu   %1, 1                                   \n"
+               "       sc      %1, %0                                  \n"
+               "       beqzl   %1, 1b                                  \n"
+               "       .set    reorder                                 \n"
+#ifdef CONFIG_SMP
+               "        sync                                           \n"
+#endif
+               "       li      %2, 1                                   \n"
+               "2:                                                     \n"
+               : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
+               : "m" (rw->lock)
+               : "memory");
+       } else {
+               __asm__ __volatile__(
+               "       .set    noreorder       # __raw_read_trylock    \n"
+               "       li      %2, 0                                   \n"
+               "1:     ll      %1, %3                                  \n"
+               "       bnez    %1, 2f                                  \n"
+               "        addu   %1, 1                                   \n"
+               "       sc      %1, %0                                  \n"
+               "       beqz    %1, 1b                                  \n"
+               "       .set    reorder                                 \n"
+#ifdef CONFIG_SMP
+               "        sync                                           \n"
+#endif
+               "       li      %2, 1                                   \n"
+               "2:                                                     \n"
+               : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
+               : "m" (rw->lock)
+               : "memory");
+       }
+
+       return ret;
+}
 
 static inline int __raw_write_trylock(raw_rwlock_t *rw)
 {
@@ -283,4 +327,9 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
        return ret;
 }
 
+
+#define _raw_spin_relax(lock)  cpu_relax()
+#define _raw_read_relax(lock)  cpu_relax()
+#define _raw_write_relax(lock) cpu_relax()
+
 #endif /* _ASM_SPINLOCK_H */