modpost: work correctly with tile coldtext sections

The tilegx and tilepro compilers use .coldtext for their unlikely
executed text section name, so an __attribute__((cold)) function
will (when compiled with higher optimization levels) land in
the .coldtext section.

Modify modpost to add .coldtext to the set of OTHER_TEXT_SECTIONS
so we don't get warnings about referencing such a section in an
__ex_table block, and then also modify arch/tile/lib/memcpy_user_64.c
so that it uses plain ".coldtext" instead of ".coldtext.memcpy".
The latter naming is a relic of an earlier use of -ffunction-sections,
which we no longer use by default.
Signed-off-by: NChris Metcalf <cmetcalf@ezchip.com>
Acked-by: NRusty Russell <rusty@rustcorp.com.au>

arch/tile/lib/memcpy_user_64.c

@@ -28,7 +28,7 @@
 #define _ST(p, inst, v)						\
 	({							\
 		asm("1: " #inst " %0, %1;"			\
-		    ".pushsection .coldtext.memcpy,\"ax\";"	\
+		    ".pushsection .coldtext,\"ax\";"	\
 		    "2: { move r0, %2; jrp lr };"		\
 		    ".section __ex_table,\"a\";"		\
 		    ".align 8;"					\
@@ -41,7 +41,7 @@
 	({							\
 		unsigned long __v;				\
 		asm("1: " #inst " %0, %1;"			\
-		    ".pushsection .coldtext.memcpy,\"ax\";"	\
+		    ".pushsection .coldtext,\"ax\";"	\
 		    "2: { move r0, %2; jrp lr };"		\
 		    ".section __ex_table,\"a\";"		\
 		    ".align 8;"					\

scripts/mod/modpost.c

@@ -886,7 +886,8 @@ static void check_section(const char *modname, struct elf_info *elf,
 #define TEXT_SECTIONS ".text", ".text.unlikely", ".sched.text", \
 		".kprobes.text"
 #define OTHER_TEXT_SECTIONS ".ref.text", ".head.text", ".spinlock.text", \
-		".fixup", ".entry.text", ".exception.text", ".text.*"
+		".fixup", ".entry.text", ".exception.text", ".text.*", \
+		".coldtext"
 
 #define INIT_SECTIONS      ".init.*"
 #define MEM_INIT_SECTIONS  ".meminit.*"