linux-kernel - [RFC PATCH 4/6] MIPS: Use update{,_tsk}_thread

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1524135528-28561-5-git-send-email-Dave.Martin@arm.com>
Date:   Thu, 19 Apr 2018 11:58:46 +0100
From:   Dave Martin <Dave.Martin@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        James Hogan <jhogan@...nel.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "David S. Miller" <davem@...emloft.net>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Oleg Nesterov <oleg@...hat.com>, linux-arch@...r.kernel.org
Subject: [RFC PATCH 4/6] MIPS: Use update{,_tsk}_thread_flag()

This patch uses the new update_thread_flag() helpers to simplify a
couple of if () set; else clear; constructs.

No functional change.

Signed-off-by: Dave Martin <Dave.Martin@....com>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: James Hogan <jhogan@...nel.org>
---
 arch/mips/kernel/elf.c     | 10 ++--------
 arch/mips/kernel/process.c | 15 ++++++---------
 arch/mips/kernel/ptrace.c  |  5 +----
 arch/mips/kernel/syscall.c | 10 ++--------
 4 files changed, 11 insertions(+), 29 deletions(-)

diff --git a/arch/mips/kernel/elf.c b/arch/mips/kernel/elf.c
index 731325a..2351509 100644
--- a/arch/mips/kernel/elf.c
+++ b/arch/mips/kernel/elf.c
@@ -267,14 +267,8 @@ int arch_check_elf(void *_ehdr, bool has_interpreter, void *_interp_ehdr,
 
 static inline void set_thread_fp_mode(int hybrid, int regs32)
 {
-	if (hybrid)
-		set_thread_flag(TIF_HYBRID_FPREGS);
-	else
-		clear_thread_flag(TIF_HYBRID_FPREGS);
-	if (regs32)
-		set_thread_flag(TIF_32BIT_FPREGS);
-	else
-		clear_thread_flag(TIF_32BIT_FPREGS);
+	update_thread_flag(TIF_HYBRID_FPREGS, hybrid);
+	update_thread_flag(TIF_32BIT_FPREGS, regs32);
 }
 
 void mips_set_personality_fp(struct arch_elf_state *state)
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index b9e9bf6..4bdecb6 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -763,18 +763,15 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value)
 	 */
 	for_each_thread(task, t) {
 		/* Update desired FP register width */
-		if (value & PR_FP_MODE_FR) {
-			clear_tsk_thread_flag(t, TIF_32BIT_FPREGS);
-		} else {
-			set_tsk_thread_flag(t, TIF_32BIT_FPREGS);
+		update_tsk_thread_flag(t, TIF_32BIT_REGS,
+				       !(value & PR_FP_MODE_FR));
+
+		if (!(value & PR_FP_MODE_FR))
 			clear_tsk_thread_flag(t, TIF_MSA_CTX_LIVE);
-		}
 
 		/* Update desired FP single layout */
-		if (value & PR_FP_MODE_FRE)
-			set_tsk_thread_flag(t, TIF_HYBRID_FPREGS);
-		else
-			clear_tsk_thread_flag(t, TIF_HYBRID_FPREGS);
+		update_tsk_thread_flag(t, TIF_HYBRID_FPREGS,
+				       value & PR_FP_MODE_FRE);
 	}
 
 	/* Allow threads to use FP again */
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 0b23b1a..b218812 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -279,10 +279,7 @@ int ptrace_set_watch_regs(struct task_struct *child,
 		child->thread.watch.mips3264.watchhi[i] = ht[i];
 	}
 
-	if (watch_active)
-		set_tsk_thread_flag(child, TIF_LOAD_WATCH);
-	else
-		clear_tsk_thread_flag(child, TIF_LOAD_WATCH);
+	update_tsk_thread_flag(child, TIF_LOAD_WATCH, watch_active);
 
 	return 0;
 }
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 69c17b5..e9fa130 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -209,14 +209,8 @@ SYSCALL_DEFINE3(sysmips, long, cmd, long, arg1, long, arg2)
 		if (arg1 & ~3)
 			return -EINVAL;
 
-		if (arg1 & 1)
-			set_thread_flag(TIF_FIXADE);
-		else
-			clear_thread_flag(TIF_FIXADE);
-		if (arg1 & 2)
-			set_thread_flag(TIF_LOGADE);
-		else
-			clear_thread_flag(TIF_LOGADE);
+		update_thread_flag(TIF_FIXADE, arg1 & 1);
+		update_thread_flag(TIF_LOGADE, arg1 & 2);
 
 		return 0;
 
-- 
2.1.4