arm64: Add assembly annotations for weak-PI-alias madness

Add yet another set of assembly symbol annotations, this time for the
borderline-absurd situation of a function aliasing to a weak symbol
which itself also wants a position-independent alias.

Signed-off-by: Robin Murphy <[e-mail]>
Link: https://lore.kernel.org/r/7554[e-mail]
Signed-off-by: Will Deacon <[e-mail]>

arch/arm64/include/asm/linkage.h

···
 		SYM_FUNC_START_ALIAS(__pi_##x);	\
 		SYM_FUNC_START_WEAK(x)
 
+#define SYM_FUNC_START_WEAK_ALIAS_PI(x)		\
+		SYM_FUNC_START_ALIAS(__pi_##x);	\
+		SYM_START(x, SYM_L_WEAK, SYM_A_ALIGN)
+
 #define SYM_FUNC_END_PI(x)			\
 		SYM_FUNC_END(x);		\
+		SYM_FUNC_END_ALIAS(__pi_##x)
+
+#define SYM_FUNC_END_ALIAS_PI(x)		\
+		SYM_FUNC_END_ALIAS(x);		\
 		SYM_FUNC_END_ALIAS(__pi_##x)
 
 #endif