X-Git-Url: http://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=compat_arch_x86.c;h=33bf13df41b7bcae348e3d4e6dcb3661d97b64d5;hp=5342c7be58842617da03ee3da930bfaea83e6947;hb=985b35b18796edab591775098fef83a50a1e55ce;hpb=e7ca6e41edaf162282d378c4cef2c81801e8af18

diff --git a/compat_arch_x86.c b/compat_arch_x86.c
index 5342c7b..33bf13d 100644
--- a/compat_arch_x86.c
+++ b/compat_arch_x86.c
@@ -201,6 +201,31 @@ unsigned long _compat_uatomic_cmpxchg(void *addr, unsigned long old,
 	return retval;
 }
 
+void _compat_uatomic_or(void *addr, unsigned long v, int len)
+{
+	sigset_t mask;
+
+	mutex_lock_signal_save(&compat_mutex, &mask);
+	switch (len) {
+	case 1:
+		*(unsigned char *)addr |= (unsigned char)v;
+		break;
+	case 2:
+		*(unsigned short *)addr |= (unsigned short)v;
+		break;
+	case 4:
+		*(unsigned int *)addr |= (unsigned int)v;
+		break;
+	default:
+		/*
+		 * generate an illegal instruction. Cannot catch this with
+		 * linker tricks when optimizations are disabled.
+		 */
+		__asm__ __volatile__("ud2");
+	}
+	mutex_lock_signal_restore(&compat_mutex, &mask);
+}
+
 unsigned long _compat_uatomic_add_return(void *addr, unsigned long v, int len)
 {
 	sigset_t mask;