Patch "sparc64: Delete __ret_efault." has been added to the 4.4-stable tree

Patch "sparc64: Delete __ret_efault." has been added to the 4.4-stable tree

[gregkh]

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

    sparc64: Delete __ret_efault.

to the 4.4-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:
     sparc64-delete-__ret_efault.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Sat Nov 19 09:52:37 CET 2016
From: "David S. Miller" <davem@davemloft.net>
Date: Wed, 10 Aug 2016 14:41:33 -0700
Subject: sparc64: Delete __ret_efault.

From: "David S. Miller" <davem@davemloft.net>


[ Upstream commit aa95ce361ed95c72ac42dcb315166bce5cf1a014 ]

It is completely unused.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/sparc/include/asm/uaccess_64.h |   41 ------------------------------------
 arch/sparc/kernel/head_64.S         |    7 ------
 arch/sparc/kernel/sparc_ksyms_64.c  |    1 
 3 files changed, 1 insertion(+), 48 deletions(-)

--- a/arch/sparc/include/asm/uaccess_64.h
+++ b/arch/sparc/include/asm/uaccess_64.h
@@ -98,7 +98,6 @@ struct exception_table_entry {
         unsigned int insn, fixup;
 };
 
-void __ret_efault(void);
 void __retl_efault(void);
 
 /* Uh, these should become the main single-value transfer routines..
@@ -179,20 +178,6 @@ int __put_user_bad(void);
 	 __gu_ret;							     \
 })
 
-#define __get_user_nocheck_ret(data, addr, size, type, retval) ({	\
-	register unsigned long __gu_val __asm__ ("l1");			\
-	switch (size) {							\
-	case 1: __get_user_asm_ret(__gu_val, ub, addr, retval); break;	\
-	case 2: __get_user_asm_ret(__gu_val, uh, addr, retval); break;	\
-	case 4: __get_user_asm_ret(__gu_val, uw, addr, retval); break;	\
-	case 8: __get_user_asm_ret(__gu_val, x, addr, retval); break;	\
-	default:							\
-		if (__get_user_bad())					\
-			return retval;					\
-	}								\
-	data = (__force type) __gu_val;					\
-})
-
 #define __get_user_asm(x, size, addr, ret)				\
 __asm__ __volatile__(							\
 		"/* Get user asm, inline. */\n"				\
@@ -214,32 +199,6 @@ __asm__ __volatile__(							\
 	       : "=r" (ret), "=r" (x) : "r" (__m(addr)),		\
 		 "i" (-EFAULT))
 
-#define __get_user_asm_ret(x, size, addr, retval)			\
-if (__builtin_constant_p(retval) && retval == -EFAULT)			\
-	__asm__ __volatile__(						\
-		"/* Get user asm ret, inline. */\n"			\
-	"1:\t"	"ld"#size "a [%1] %%asi, %0\n\n\t"			\
-		".section __ex_table,\"a\"\n\t"				\
-		".align	4\n\t"						\
-		".word	1b,__ret_efault\n\n\t"				\
-		".previous\n\t"						\
-	       : "=r" (x) : "r" (__m(addr)));				\
-else									\
-	__asm__ __volatile__(						\
-		"/* Get user asm ret, inline. */\n"			\
-	"1:\t"	"ld"#size "a [%1] %%asi, %0\n\n\t"			\
-		".section .fixup,#alloc,#execinstr\n\t"			\
-		".align	4\n"						\
-	"3:\n\t"							\
-		"ret\n\t"						\
-		" restore %%g0, %2, %%o0\n\n\t"				\
-		".previous\n\t"						\
-		".section __ex_table,\"a\"\n\t"				\
-		".align	4\n\t"						\
-		".word	1b, 3b\n\n\t"					\
-		".previous\n\t"						\
-	       : "=r" (x) : "r" (__m(addr)), "i" (retval))
-
 int __get_user_bad(void);
 
 unsigned long __must_check ___copy_from_user(void *to,
--- a/arch/sparc/kernel/head_64.S
+++ b/arch/sparc/kernel/head_64.S
@@ -922,12 +922,7 @@ prom_tba:	.xword	0
 tlb_type:	.word	0	/* Must NOT end up in BSS */
 	.section	".fixup",#alloc,#execinstr
 
-	.globl	__ret_efault, __retl_efault, __ret_one, __retl_one
-ENTRY(__ret_efault)
-	ret
-	 restore %g0, -EFAULT, %o0
-ENDPROC(__ret_efault)
-
+	.globl	__retl_efault, __ret_one, __retl_one
 ENTRY(__retl_efault)
 	retl
 	 mov	-EFAULT, %o0
--- a/arch/sparc/kernel/sparc_ksyms_64.c
+++ b/arch/sparc/kernel/sparc_ksyms_64.c
@@ -27,7 +27,6 @@ EXPORT_SYMBOL(__flushw_user);
 EXPORT_SYMBOL_GPL(real_hard_smp_processor_id);
 
 /* from head_64.S */
-EXPORT_SYMBOL(__ret_efault);
 EXPORT_SYMBOL(tlb_type);
 EXPORT_SYMBOL(sun4v_chip_type);
 EXPORT_SYMBOL(prom_root_node);


Patches currently in stable-queue which might be from davem@davemloft.net are

queue-4.4/sparc64-delete-now-unused-user-copy-fixup-functions.patch
queue-4.4/net-__skb_flow_dissect-must-cap-its-return-value.patch
queue-4.4/tcp-take-care-of-truncations-done-by-sk_filter.patch
queue-4.4/net-clear-sk_err_soft-in-sk_clone_lock.patch
queue-4.4/sparc64-convert-copy_in_user-to-accurate-exception-reporting.patch
queue-4.4/sparc64-handle-extremely-large-kernel-tlb-range-flushes-more-gracefully.patch
queue-4.4/sparc-handle-negative-offsets-in-arch_jump_label_transform.patch
queue-4.4/sparc64-delete-__ret_efault.patch
queue-4.4/dctcp-avoid-bogus-doubling-of-cwnd-after-loss.patch
queue-4.4/sparc64-delete-now-unused-user-copy-assembler-helpers.patch
queue-4.4/net-mangle-zero-checksum-in-skb_checksum_help.patch
queue-4.4/sparc64-mm-fix-base-tsb-sizing-when-hugetlb-pages-are-used.patch
queue-4.4/ip6_tunnel-clear-ip6cb-in-ip6tunnel_xmit.patch
queue-4.4/sctp-assign-assoc_id-earlier-in-__sctp_connect.patch
queue-4.4/sparc64-convert-ng4copy_-from-to-_user-to-accurate-exception-reporting.patch
queue-4.4/ipv6-dccp-fix-out-of-bound-access-in-dccp_v6_err.patch
queue-4.4/sparc64-convert-u3copy_-from-to-_user-to-accurate-exception-reporting.patch
queue-4.4/sparc64-convert-ng2copy_-from-to-_user-to-accurate-exception-reporting.patch
queue-4.4/sparc64-fix-illegal-relative-branches-in-hypervisor-patched-tlb-code.patch
queue-4.4/sparc64-convert-gencopy_-from-to-_user-to-accurate-exception-reporting.patch
queue-4.4/sparc64-convert-u1copy_-from-to-_user-to-accurate-exception-reporting.patch
queue-4.4/sparc-don-t-leak-context-bits-into-thread-fault_address.patch
queue-4.4/sparc64-prepare-to-move-to-more-saner-user-copy-exception-handling.patch
queue-4.4/bgmac-stop-clearing-dma-receive-control-register-right-after-it-is-set.patch
queue-4.4/ipv6-dccp-add-missing-bind_conflict-to-dccp_ipv6_mapped.patch
queue-4.4/tcp-fix-potential-memory-corruption.patch
queue-4.4/sparc64-convert-ngcopy_-from-to-_user-to-accurate-exception-reporting.patch
queue-4.4/fib_trie-correct-proc-net-route-off-by-one-error.patch
queue-4.4/sparc64-fix-illegal-relative-branches-in-hypervisor-patched-tlb-cross-call-code.patch
queue-4.4/sparc64-handle-extremely-large-kernel-tsb-range-flushes-sanely.patch
queue-4.4/sparc64-fix-instruction-count-in-comment-for-__hypervisor_flush_tlb_pending.patch
queue-4.4/sparc-serial-sunhv-fix-a-double-lock-bug.patch
queue-4.4/dccp-do-not-send-reset-to-already-closed-sockets.patch
queue-4.4/ipv4-use-new_gw-for-redirect-neigh-lookup.patch
queue-4.4/dccp-fix-out-of-bound-access-in-dccp_v4_err.patch
queue-4.4/sock-fix-sendmmsg-for-partial-sendmsg.patch