From: "Christopher M. Riedl" <cmr@codefail.de>
To: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v4 05/10] powerpc/signal64: Remove TM ifdefery in middle of if/else block
Date: Wed, 27 Jan 2021 22:04:19 -0600 [thread overview]
Message-ID: <20210128040424.12720-6-cmr@codefail.de> (raw)
In-Reply-To: <20210128040424.12720-1-cmr@codefail.de>
Rework the messy ifdef breaking up the if-else for TM similar to
commit f1cf4f93de2f ("powerpc/signal32: Remove ifdefery in middle of if/else").
Unlike that commit for ppc32, the ifdef can't be removed entirely since
uc_transact in sigframe depends on CONFIG_PPC_TRANSACTIONAL_MEM.
Signed-off-by: Christopher M. Riedl <cmr@codefail.de>
---
arch/powerpc/kernel/signal_64.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index b211a8ea4f6e..8e1d804ce552 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -710,9 +710,7 @@ SYSCALL_DEFINE0(rt_sigreturn)
struct pt_regs *regs = current_pt_regs();
struct ucontext __user *uc = (struct ucontext __user *)regs->gpr[1];
sigset_t set;
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
unsigned long msr;
-#endif
/* Always make any pending restarted system calls return -EINTR */
current->restart_block.fn = do_no_restart_syscall;
@@ -765,7 +763,10 @@ SYSCALL_DEFINE0(rt_sigreturn)
if (__get_user(msr, &uc->uc_mcontext.gp_regs[PT_MSR]))
goto badframe;
+#endif
+
if (MSR_TM_ACTIVE(msr)) {
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/* We recheckpoint on return. */
struct ucontext __user *uc_transact;
@@ -778,9 +779,8 @@ SYSCALL_DEFINE0(rt_sigreturn)
if (restore_tm_sigcontexts(current, &uc->uc_mcontext,
&uc_transact->uc_mcontext))
goto badframe;
- } else
#endif
- {
+ } else {
/*
* Fall through, for non-TM restore
*
@@ -818,10 +818,8 @@ int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
unsigned long newsp = 0;
long err = 0;
struct pt_regs *regs = tsk->thread.regs;
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/* Save the thread's msr before get_tm_stackpointer() changes it */
unsigned long msr = regs->msr;
-#endif
frame = get_sigframe(ksig, tsk, sizeof(*frame), 0);
if (!access_ok(frame, sizeof(*frame)))
@@ -836,8 +834,9 @@ int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __save_altstack(&frame->uc.uc_stack, regs->gpr[1]);
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+
if (MSR_TM_ACTIVE(msr)) {
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/* The ucontext_t passed to userland points to the second
* ucontext_t (for transactional state) with its uc_link ptr.
*/
@@ -847,9 +846,8 @@ int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
tsk, ksig->sig, NULL,
(unsigned long)ksig->ka.sa.sa_handler,
msr);
- } else
#endif
- {
+ } else {
err |= __put_user(0, &frame->uc.uc_link);
prepare_setup_sigcontext(tsk, 1);
err |= setup_sigcontext(&frame->uc.uc_mcontext, tsk, ksig->sig,
--
2.26.1
next prev parent reply other threads:[~2021-01-28 4:19 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-28 4:04 [PATCH v4 00/10] Improve signal performance on PPC64 with KUAP Christopher M. Riedl
2021-01-28 4:04 ` [PATCH v4 01/10] powerpc/uaccess: Add unsafe_copy_from_user Christopher M. Riedl
2021-01-28 4:04 ` [PATCH v4 02/10] powerpc/signal: Add unsafe_copy_{vsx, fpr}_from_user() Christopher M. Riedl
2021-01-28 10:38 ` David Laight
2021-01-28 12:05 ` Christophe Leroy
2021-02-01 15:55 ` Christopher M. Riedl
2021-02-01 16:15 ` David Laight
2021-02-01 16:55 ` Christopher M. Riedl
2021-02-01 17:37 ` David Laight
2021-02-01 17:43 ` Christopher M. Riedl
2021-02-01 16:54 ` Gabriel Paubert
2021-02-01 20:55 ` Christopher M. Riedl
2021-02-04 6:09 ` Michael Ellerman
2021-01-28 4:04 ` [PATCH v4 03/10] powerpc/signal64: Move non-inline functions out of setup_sigcontext() Christopher M. Riedl
2021-01-28 4:04 ` [PATCH v4 04/10] powerpc: Reference param in MSR_TM_ACTIVE() macro Christopher M. Riedl
2021-01-28 4:04 ` Christopher M. Riedl [this message]
2021-01-28 4:04 ` [PATCH v4 06/10] powerpc/signal64: Replace setup_sigcontext() w/ unsafe_setup_sigcontext() Christopher M. Riedl
2021-01-28 4:04 ` [PATCH v4 07/10] powerpc/signal64: Replace restore_sigcontext() w/ unsafe_restore_sigcontext() Christopher M. Riedl
2021-01-28 4:04 ` [PATCH v4 08/10] powerpc/signal64: Rewrite handle_rt_signal64() to minimise uaccess switches Christopher M. Riedl
2021-01-28 4:04 ` [PATCH v4 09/10] powerpc/signal64: Rewrite rt_sigreturn() " Christopher M. Riedl
2021-01-28 4:04 ` [PATCH v4 10/10] powerpc/signal64: Use __get_user() to copy sigset_t Christopher M. Riedl
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=20210128040424.12720-6-cmr@codefail.de \
--to=cmr@codefail.de \
--cc=linuxppc-dev@lists.ozlabs.org \
/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;
as well as URLs for NNTP newsgroup(s).