Add missing 64-bit divide for 32-bit ARM

Leverage the existing generic 64-bit division operations which
were originally implemented for x86 to support ARM.  All that is
required is to make the symbols available to the linker with the
expected names.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

diff --git a/module/spl/spl-generic.c b/module/spl/spl-generic.c
index be099aaae83d81ade8bc162478e18c1db02020f6..d22100ea3cbb937d6d55be2d4ac37c92cdbf722d 100644 (file)
--- a/module/spl/spl-generic.c
+++ b/module/spl/spl-generic.c
@@ -183,7 +183,7 @@ __udivdi3(uint64_t u, uint64_t v)
                        q0 = q0 - 1;            // too small by 1.
                if ((u - q0 * v) >= v)
                        q0 = q0 + 1;            // Now q0 is correct.
-       
+
                return q0;
        }
 }
@@ -212,6 +212,27 @@ __umoddi3(uint64_t dividend, uint64_t divisor)
 }
 EXPORT_SYMBOL(__umoddi3);
 
+#if defined(__arm) || defined(__arm__)
+/*
+ * Implementation of 64-bit unsigned division for 32-bit arm machines.
+ */
+uint64_t
+__aeabi_uldivmod(uint64_t u, uint64_t v)
+{
+       return __udivdi3(u, v);
+}
+EXPORT_SYMBOL(__aeabi_uldivmod);
+
+/*
+ * Implementation of 64-bit signed division for 32-bit arm machines.
+ */
+int64_t
+__aeabi_ldivmod(int64_t u, int64_t v)
+{
+       return __divdi3(u, v);
+}
+EXPORT_SYMBOL(__aeabi_ldivmod);
+#endif /* __arm || __arm__ */
 #endif /* BITS_PER_LONG */
 
 /* NOTE: The strtoxx behavior is solely based on my reading of the Solaris