mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Heiko Carstens <hca@linux.ibm.com>
To: Alexander Gordeev <agordeev@linux.ibm.com>,
	Sven Schnelle <svens@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Christian Borntraeger <borntraeger@linux.ibm.com>,
	Niklas Schnelle <schnelle@linux.ibm.com>,
	Matthew Rosato <mjrosato@linux.ibm.com>,
	Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
	Vineeth Vijayan <vneethv@linux.ibm.com>,
	Peter Oberparleiter <oberpar@linux.ibm.com>,
	Harald Freudenberger <freude@linux.ibm.com>,
	Holger Dengler <dengler@linux.ibm.com>,
	Stefan Haberland <sth@linux.ibm.com>,
	Jan Hoeppner <hoeppner@linux.ibm.com>,
	Ilya Leoshkevich <iii@linux.ibm.com>,
	Janosch Frank <frankja@linux.ibm.com>,
	Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [PATCH 13/32] s390/futex: Convert inline assembly to EX_TABLE_INSN
Date: Thu,  1 Oct 2026 12:32:28 +0200	[thread overview]
Message-ID: <20261001103247.1989111-14-hca@linux.ibm.com> (raw)
In-Reply-To: <20261001103247.1989111-1-hca@linux.ibm.com>

Convert all futex exception table entries to use EX_TABLE_INSN.
With EX_TABLE_INSN entries always point to the faulting instruction,
so duplicate entries are removed.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/include/asm/futex.h | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/arch/s390/include/asm/futex.h b/arch/s390/include/asm/futex.h
index 942f21c39697..71e8060637be 100644
--- a/arch/s390/include/asm/futex.h
+++ b/arch/s390/include/asm/futex.h
@@ -23,13 +23,11 @@ __futex_atomic_##name(int oparg, int *old, u32 __user *uaddr)			\
 		"0:	l	%[old],%[uaddr]\n"				\
 		"1:"insn							\
 		"2:	cs	%[old],%[new],%[uaddr]\n"			\
-		"3:	jl	1b\n"						\
+		"	jl	1b\n"						\
 		"	lhi	%[rc],0\n"					\
-		"4:	sacf	768\n"						\
-		EX_TABLE_UA_FAULT(0b, 4b, %[rc])				\
-		EX_TABLE_UA_FAULT(1b, 4b, %[rc])				\
-		EX_TABLE_UA_FAULT(2b, 4b, %[rc])				\
-		EX_TABLE_UA_FAULT(3b, 4b, %[rc])				\
+		"3:	sacf	768\n"						\
+		EX_TABLE_INSN_UA_FAULT(0b, 3b, %[rc])				\
+		EX_TABLE_INSN_UA_FAULT(2b, 3b, %[rc])				\
 		: [rc] "=d" (rc), [old] "=&d" (*old),				\
 		  [new] "=&d" (new), [uaddr] "+Q" (*uaddr)			\
 		: [oparg] "d" (oparg)						\
@@ -86,10 +84,9 @@ int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval, u32
 	asm_inline volatile(
 		"	sacf	256\n"
 		"0:	cs	%[old],%[new],%[uaddr]\n"
-		"1:	lhi	%[rc],0\n"
-		"2:	sacf	768\n"
-		EX_TABLE_UA_FAULT(0b, 2b, %[rc])
-		EX_TABLE_UA_FAULT(1b, 2b, %[rc])
+		"	lhi	%[rc],0\n"
+		"1:	sacf	768\n"
+		EX_TABLE_INSN_UA_FAULT(0b, 1b, %[rc])
 		: [rc] "=d" (rc), [old] "+d" (oldval), [uaddr] "+Q" (*uaddr)
 		: [new] "d" (newval)
 		: "cc", "memory");
-- 
2.53.0


  parent reply	other threads:[~2026-10-01 10:33 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-01 10:32 [PATCH 00/32] s390: Improve exception table handling and disassembler Heiko Carstens
2026-10-01 10:32 ` [PATCH 01/32] s390/kprobes: Prevent kprobes on instructions with exception table entry Heiko Carstens
2026-10-01 10:32 ` [PATCH 02/32] s390/early: Fix early warning handling Heiko Carstens
2026-10-01 10:32 ` [PATCH 03/32] s390: Clear pt_regs flags field Heiko Carstens
2026-10-01 10:32 ` [PATCH 04/32] s390/bug: Indicate modified PSW in disassembly Heiko Carstens
2026-10-01 10:32 ` [PATCH 05/32] s390/tools: Rename gen_facilities to gen_bitmaps Heiko Carstens
2026-10-01 10:32 ` [PATCH 06/32] s390/tools: Generate bitmap of nullified program checks Heiko Carstens
2026-10-01 10:32 ` [PATCH 07/32] s390/traps: Handle nullifying program checks in get_trap_ip() Heiko Carstens
2026-10-01 10:32 ` [PATCH 08/32] s390/dis: Improve show_code() output Heiko Carstens
2026-10-01 10:32 ` [PATCH 09/32] s390/extable: Rework exception handling logic Heiko Carstens
2026-10-01 10:32 ` [PATCH 10/32] s390/diag: Convert amode31 exception tables to EX_TABLE_INSN Heiko Carstens
2026-10-01 10:32 ` [PATCH 11/32] s390/uaccess: Convert inline assembly " Heiko Carstens
2026-10-01 10:32 ` [PATCH 12/32] s390/lib/uaccess: " Heiko Carstens
2026-10-01 10:32 ` Heiko Carstens [this message]
2026-10-01 10:32 ` [PATCH 14/32] s390/diag: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 15/32] s390/mm/pfault: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 16/32] s390/cpu_mf: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 17/32] s390/cert_store: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 18/32] s390/ipl: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 19/32] s390/hypfs: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 20/32] s390/ap: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 21/32] s390/fpu: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 22/32] s390/traps: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 23/32] s390/word-at-a-time: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 24/32] s390/kvm: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 25/32] s390/pci: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 26/32] s390/boot: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 27/32] s390/cio: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 28/32] s390/dasd: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 29/32] s390/diag_ftp: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 30/32] s390/sclp: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 31/32] s390/bpf: Simplify exception table entry handling Heiko Carstens
2026-10-01 10:32 ` [PATCH 32/32] s390/extable: Remove EX_TABLE macros and fallback extable search Heiko Carstens

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20261001103247.1989111-14-hca@linux.ibm.com \
    --to=hca@linux.ibm.com \
    --cc=agordeev@linux.ibm.com \
    --cc=borntraeger@linux.ibm.com \
    --cc=dengler@linux.ibm.com \
    --cc=frankja@linux.ibm.com \
    --cc=freude@linux.ibm.com \
    --cc=gerald.schaefer@linux.ibm.com \
    --cc=gor@linux.ibm.com \
    --cc=hoeppner@linux.ibm.com \
    --cc=iii@linux.ibm.com \
    --cc=imbrenda@linux.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-s390@vger.kernel.org \
    --cc=mjrosato@linux.ibm.com \
    --cc=oberpar@linux.ibm.com \
    --cc=schnelle@linux.ibm.com \
    --cc=sth@linux.ibm.com \
    --cc=svens@linux.ibm.com \
    --cc=vneethv@linux.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox

all inboxes | Powered by JetHome®