Patch "ia64: fix module loading for gcc-5.4" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

ia64: fix module loading for gcc-5.4

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:

     ia64-fix-module-loading-for-gcc-5.4.patch

and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Sergei Trofimovich <[email protected]>
Date: Mon, 1 May 2017 11:51:55 -0700
Subject: ia64: fix module loading for gcc-5.4

From: Sergei Trofimovich <[email protected]>

[ Upstream commit a25fb8508c1b80dce742dbeaa4d75a1e9f2c5617 ]

Starting from gcc-5.4+ gcc generates MLX instructions in more cases to refer local symbols:

    https://gcc.gnu.org/PR60465

That caused ia64 module loader to choke on such instructions:

fuse: invalid slot number 1 for IMM64

The Linux kernel used to handle only case where relocation pointed to slot=2 instruction in the bundle. That limitation was fixed in linux by commit 9c184a073bfd ("[IA64] Fix 2.6 kernel for the new ia64 assembler") See

    http://sources.redhat.com/bugzilla/show_bug.cgi?id=1433

This change lifts the slot=2 restriction from the kernel module loader.

Tested on 'fuse' and 'btrfs' kernel modules.

---
 arch/ia64/kernel/module.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -153,7 +153,7 @@ slot (const struct insn *insn)
 static int
 apply_imm64 (struct module *mod, struct insn *insn, uint64_t val)
 {
-	if (slot(insn) != 2) {
+	if (slot(insn) != 1 && slot(insn) != 2) {
 		printk(KERN_ERR "%s: invalid slot number %d for IMM64\n",
 		       mod->name, slot(insn));
 		return 0;

@@ -165,7 +165,7 @@ apply_imm64 (struct module *mod, struct
 static int
 apply_imm60 (struct module *mod, struct insn *insn, uint64_t val)
 {
-	if (slot(insn) != 2) {
+	if (slot(insn) != 1 && slot(insn) != 2) {
 		printk(KERN_ERR "%s: invalid slot number %d for IMM60\n",
 		       mod->name, slot(insn));
 		return 0;

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/ia64-fix-module-loading-for-gcc-5.4.patch