[ARM32,v4.4,V2,31/47] ARM: 8793/1: signal: replace __put_user_error with __put_user

Message ID 8aaea1bd07c7c54db7efc732ac3a041c32d3bb4a.1564646727.git.viresh.kumar@linaro.org
State New
Headers show
Series
  • V4.4 backport of arm32 Spectre patches
Related show

Commit Message

Viresh Kumar Aug. 1, 2019, 8:16 a.m.
From: Julien Thierry <julien.thierry@arm.com>


Commit 18ea66bd6e7a95bdc598223d72757190916af28b upstream.

With Spectre-v1.1 mitigations, __put_user_error is pointless. In an attempt
to remove it, replace its references in frame setups with __put_user.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

---
 arch/arm/kernel/signal.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

-- 
2.21.0.rc0.269.g1a574e7a288b

Patch

diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 6f0bd90f6d93..4a4ab72d27ba 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -301,7 +301,7 @@  setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set)
 	if (err == 0)
 		err |= preserve_vfp_context(&aux->vfp);
 #endif
-	__put_user_error(0, &aux->end_magic, err);
+	err |= __put_user(0, &aux->end_magic);
 
 	return err;
 }
@@ -433,7 +433,7 @@  setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
 	/*
 	 * Set uc.uc_flags to a value which sc.trap_no would never have.
 	 */
-	__put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err);
+	err = __put_user(0x5ac3c35a, &frame->uc.uc_flags);
 
 	err |= setup_sigframe(frame, regs, set);
 	if (err == 0)
@@ -453,8 +453,8 @@  setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
 
 	err |= copy_siginfo_to_user(&frame->info, &ksig->info);
 
-	__put_user_error(0, &frame->sig.uc.uc_flags, err);
-	__put_user_error(NULL, &frame->sig.uc.uc_link, err);
+	err |= __put_user(0, &frame->sig.uc.uc_flags);
+	err |= __put_user(NULL, &frame->sig.uc.uc_link);
 
 	err |= __save_altstack(&frame->sig.uc.uc_stack, regs->ARM_sp);
 	err |= setup_sigframe(&frame->sig, regs, set);