Patch "ARM: 9078/1: Add warn suppress parameter to arm_gen_branch_link()" has been added to the 4.19-stable tree
flat view
From: <gregkh@linuxfoundation.org>
Date: 2021-10-04 11:26:34
This is a note to let you know that I've just added the patch titled
ARM: 9078/1: Add warn suppress parameter to arm_gen_branch_link()
to the 4.19-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:
arm-9078-1-add-warn-suppress-parameter-to-arm_gen_branch_link.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let [off-list ref] know about it.
From foo@baz Mon Oct 4 01:05:22 PM CEST 2021
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Mon, 27 Sep 2021 14:02:44 -0700
Subject: ARM: 9078/1: Add warn suppress parameter to arm_gen_branch_link()
To: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Sasha Levin <sashal@kernel.org>, Alex Sverdlin <redacted>, Russell King <redacted>, Florian Fainelli <f.fainelli@gmail.com>, Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@redhat.com>, Russell King <linux@armlinux.org.uk>, linux-arm-kernel@lists.infradead.org (moderated list:ARM PORT)
Message-ID: [ref]
From: Alex Sverdlin <redacted>
commit 890cb057a46d323fd8c77ebecb6485476614cd21 upstream
Will be used in the following patch. No functional change.
Signed-off-by: Alexander Sverdlin <redacted>
Signed-off-by: Russell King <redacted>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm/include/asm/insn.h | 8 ++++----
arch/arm/kernel/ftrace.c | 2 +-
arch/arm/kernel/insn.c | 19 ++++++++++---------
3 files changed, 15 insertions(+), 14 deletions(-)
--- a/arch/arm/include/asm/insn.h
+++ b/arch/arm/include/asm/insn.h@@ -13,18 +13,18 @@ arm_gen_nop(void) } unsigned long -__arm_gen_branch(unsigned long pc, unsigned long addr, bool link); +__arm_gen_branch(unsigned long pc, unsigned long addr, bool link, bool warn); static inline unsigned long arm_gen_branch(unsigned long pc, unsigned long addr) { - return __arm_gen_branch(pc, addr, false); + return __arm_gen_branch(pc, addr, false, true); } static inline unsigned long -arm_gen_branch_link(unsigned long pc, unsigned long addr) +arm_gen_branch_link(unsigned long pc, unsigned long addr, bool warn) { - return __arm_gen_branch(pc, addr, true); + return __arm_gen_branch(pc, addr, true, warn); } #endif --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c
@@ -98,7 +98,7 @@ int ftrace_arch_code_modify_post_process static unsigned long ftrace_call_replace(unsigned long pc, unsigned long addr) { - return arm_gen_branch_link(pc, addr); + return arm_gen_branch_link(pc, addr, true); } static int ftrace_modify_code(unsigned long pc, unsigned long old, --- a/arch/arm/kernel/insn.c +++ b/arch/arm/kernel/insn.c
@@ -3,8 +3,9 @@ #include <linux/kernel.h> #include <asm/opcodes.h> -static unsigned long -__arm_gen_branch_thumb2(unsigned long pc, unsigned long addr, bool link) +static unsigned long __arm_gen_branch_thumb2(unsigned long pc, + unsigned long addr, bool link, + bool warn) { unsigned long s, j1, j2, i1, i2, imm10, imm11; unsigned long first, second;
@@ -12,7 +13,7 @@ __arm_gen_branch_thumb2(unsigned long pc offset = (long)addr - (long)(pc + 4); if (offset < -16777216 || offset > 16777214) { - WARN_ON_ONCE(1); + WARN_ON_ONCE(warn); return 0; }
@@ -33,8 +34,8 @@ __arm_gen_branch_thumb2(unsigned long pc return __opcode_thumb32_compose(first, second); } -static unsigned long -__arm_gen_branch_arm(unsigned long pc, unsigned long addr, bool link) +static unsigned long __arm_gen_branch_arm(unsigned long pc, unsigned long addr, + bool link, bool warn) { unsigned long opcode = 0xea000000; long offset;
@@ -44,7 +45,7 @@ __arm_gen_branch_arm(unsigned long pc, u offset = (long)addr - (long)(pc + 8); if (unlikely(offset < -33554432 || offset > 33554428)) { - WARN_ON_ONCE(1); + WARN_ON_ONCE(warn); return 0; }
@@ -54,10 +55,10 @@ __arm_gen_branch_arm(unsigned long pc, u } unsigned long -__arm_gen_branch(unsigned long pc, unsigned long addr, bool link) +__arm_gen_branch(unsigned long pc, unsigned long addr, bool link, bool warn) { if (IS_ENABLED(CONFIG_THUMB2_KERNEL)) - return __arm_gen_branch_thumb2(pc, addr, link); + return __arm_gen_branch_thumb2(pc, addr, link, warn); else - return __arm_gen_branch_arm(pc, addr, link); + return __arm_gen_branch_arm(pc, addr, link, warn); }
Patches currently in stable-queue which might be from f.fainelli@gmail.com are queue-4.19/arm-9098-1-ftrace-module_plt-fix-build-problem-without-dynamic_ftrace.patch queue-4.19/arm-9079-1-ftrace-add-module_plts-support.patch queue-4.19/arm-9078-1-add-warn-suppress-parameter-to-arm_gen_branch_link.patch queue-4.19/arm-9077-1-plt-move-struct-plt_entries-definition-to-header.patch _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel