All of lore.kernel.org
 help / color / mirror / Atom feed
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 16/25] powerpc/signal32: Move signal trampoline setup to handle_[rt_]signal32
Date: Tue, 18 Aug 2020 17:19:28 +0000 (UTC)	[thread overview]
Message-ID: <e439cc0fa35aa45da6776520777a61848b92fd4b.1597770847.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1597770847.git.christophe.leroy@csgroup.eu>

Move signal trampoline setup into handle_signal32()
and handle_rt_signal32().

At the same time, remove the define which hides the mc_pad field
used for trampoline.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/kernel/signal_32.c | 61 ++++++++++++---------------------
 1 file changed, 22 insertions(+), 39 deletions(-)

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index ab8c8cb98b15..d8c3843102df 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -199,9 +199,6 @@ struct sigframe {
 	int			abigap[56];
 };
 
-/* We use the mc_pad field for the signal return trampoline. */
-#define tramp	mc_pad
-
 /*
  *  When we have rt signals to deliver, we set up on the
  *  user stack, going down from the original stack pointer:
@@ -236,8 +233,7 @@ struct rt_sigframe {
  * altivec/spe instructions at some point.
  */
 static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
-			  struct mcontext __user *tm_frame, int sigret,
-			  int ctx_has_vsx_region)
+			  struct mcontext __user *tm_frame, int ctx_has_vsx_region)
 {
 	unsigned long msr = regs->msr;
 
@@ -320,15 +316,6 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
 	if (tm_frame && __put_user(0, &tm_frame->mc_gregs[PT_MSR]))
 		return 1;
 
-	if (sigret) {
-		/* Set up the sigreturn trampoline: li 0,sigret; sc */
-		if (__put_user(PPC_INST_ADDI + sigret, &frame->tramp[0])
-		    || __put_user(PPC_INST_SC, &frame->tramp[1]))
-			return 1;
-		flush_icache_range((unsigned long) &frame->tramp[0],
-				   (unsigned long) &frame->tramp[2]);
-	}
-
 	return 0;
 }
 
@@ -342,10 +329,8 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
  *
  * See save_user_regs() and signal_64.c:setup_tm_sigcontexts().
  */
-static int save_tm_user_regs(struct pt_regs *regs,
-			     struct mcontext __user *frame,
-			     struct mcontext __user *tm_frame, int sigret,
-			     unsigned long msr)
+static int save_tm_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
+			     struct mcontext __user *tm_frame, unsigned long msr)
 {
 	WARN_ON(tm_suspend_disabled);
 
@@ -461,14 +446,6 @@ static int save_tm_user_regs(struct pt_regs *regs,
 
 	if (__put_user(msr, &frame->mc_gregs[PT_MSR]))
 		return 1;
-	if (sigret) {
-		/* Set up the sigreturn trampoline: li 0,sigret; sc */
-		if (__put_user(PPC_INST_ADDI + sigret, &frame->tramp[0])
-		    || __put_user(PPC_INST_SC, &frame->tramp[1]))
-			return 1;
-		flush_icache_range((unsigned long) &frame->tramp[0],
-				   (unsigned long) &frame->tramp[2]);
-	}
 
 	return 0;
 }
@@ -755,7 +732,6 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
 	struct mcontext __user *mctx;
 	struct mcontext __user *tm_mctx = NULL;
 	unsigned long newsp = 0;
-	int sigret;
 	unsigned long tramp;
 	struct pt_regs *regs = tsk->thread.regs;
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
@@ -782,11 +758,15 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
 
 	/* Save user registers on the stack */
 	if (vdso32_rt_sigtramp && tsk->mm->context.vdso_base) {
-		sigret = 0;
 		tramp = tsk->mm->context.vdso_base + vdso32_rt_sigtramp;
 	} else {
-		sigret = __NR_rt_sigreturn;
-		tramp = (unsigned long)mctx->tramp;
+		tramp = (unsigned long)mctx->mc_pad;
+		/* Set up the sigreturn trampoline: li r0,sigret; sc */
+		if (__put_user(PPC_INST_ADDI + __NR_sigreturn, &mctx->mc_pad[0]))
+			goto badframe;
+		if (__put_user(PPC_INST_SC, &mctx->mc_pad[1]))
+			goto badframe;
+		flush_icache_range(tramp, tramp + 2 * sizeof(unsigned long));
 	}
 
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
@@ -796,7 +776,7 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
 		    __put_user((unsigned long)tm_mctx,
 			       &frame->uc_transact.uc_regs))
 			goto badframe;
-		if (save_tm_user_regs(regs, mctx, tm_mctx, sigret, msr))
+		if (save_tm_user_regs(regs, mctx, tm_mctx, msr))
 			goto badframe;
 	}
 	else
@@ -804,7 +784,7 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
 	{
 		if (__put_user(0, &frame->uc.uc_link))
 			goto badframe;
-		if (save_user_regs(regs, mctx, tm_mctx, sigret, 1))
+		if (save_user_regs(regs, mctx, tm_mctx, 1))
 			goto badframe;
 	}
 	regs->link = tramp;
@@ -847,7 +827,6 @@ int handle_signal32(struct ksignal *ksig, sigset_t *oldset,
 	struct mcontext __user *mctx;
 	struct mcontext __user *tm_mctx = NULL;
 	unsigned long newsp = 0;
-	int sigret;
 	unsigned long tramp;
 	struct pt_regs *regs = tsk->thread.regs;
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
@@ -880,22 +859,26 @@ int handle_signal32(struct ksignal *ksig, sigset_t *oldset,
 		goto badframe;
 
 	if (vdso32_sigtramp && tsk->mm->context.vdso_base) {
-		sigret = 0;
 		tramp = tsk->mm->context.vdso_base + vdso32_sigtramp;
 	} else {
-		sigret = __NR_sigreturn;
-		tramp = (unsigned long)mctx->tramp;
+		tramp = (unsigned long)mctx->mc_pad;
+		/* Set up the sigreturn trampoline: li r0,sigret; sc */
+		if (__put_user(PPC_INST_ADDI + __NR_sigreturn, &mctx->mc_pad[0]))
+			goto badframe;
+		if (__put_user(PPC_INST_SC, &mctx->mc_pad[1]))
+			goto badframe;
+		flush_icache_range(tramp, tramp + 2 * sizeof(unsigned long));
 	}
 
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 	if (MSR_TM_ACTIVE(msr)) {
-		if (save_tm_user_regs(regs, mctx, tm_mctx, sigret, msr))
+		if (save_tm_user_regs(regs, mctx, tm_mctx, msr))
 			goto badframe;
 	}
 	else
 #endif
 	{
-		if (save_user_regs(regs, mctx, tm_mctx, sigret, 1))
+		if (save_user_regs(regs, mctx, tm_mctx, 1))
 			goto badframe;
 	}
 
@@ -1047,7 +1030,7 @@ SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
 		mctx = (struct mcontext __user *)
 			((unsigned long) &old_ctx->uc_mcontext & ~0xfUL);
 		if (!access_ok(old_ctx, ctx_size)
-		    || save_user_regs(regs, mctx, NULL, 0, ctx_has_vsx_region)
+		    || save_user_regs(regs, mctx, NULL, ctx_has_vsx_region)
 		    || put_sigset_t(&old_ctx->uc_sigmask, &current->blocked)
 		    || __put_user(to_user_ptr(mctx), &old_ctx->uc_regs))
 			return -EFAULT;
-- 
2.25.0


WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 16/25] powerpc/signal32: Move signal trampoline setup to handle_[rt_]signal32
Date: Tue, 18 Aug 2020 17:19:28 +0000 (UTC)	[thread overview]
Message-ID: <e439cc0fa35aa45da6776520777a61848b92fd4b.1597770847.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1597770847.git.christophe.leroy@csgroup.eu>

Move signal trampoline setup into handle_signal32()
and handle_rt_signal32().

At the same time, remove the define which hides the mc_pad field
used for trampoline.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/kernel/signal_32.c | 61 ++++++++++++---------------------
 1 file changed, 22 insertions(+), 39 deletions(-)

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index ab8c8cb98b15..d8c3843102df 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -199,9 +199,6 @@ struct sigframe {
 	int			abigap[56];
 };
 
-/* We use the mc_pad field for the signal return trampoline. */
-#define tramp	mc_pad
-
 /*
  *  When we have rt signals to deliver, we set up on the
  *  user stack, going down from the original stack pointer:
@@ -236,8 +233,7 @@ struct rt_sigframe {
  * altivec/spe instructions at some point.
  */
 static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
-			  struct mcontext __user *tm_frame, int sigret,
-			  int ctx_has_vsx_region)
+			  struct mcontext __user *tm_frame, int ctx_has_vsx_region)
 {
 	unsigned long msr = regs->msr;
 
@@ -320,15 +316,6 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
 	if (tm_frame && __put_user(0, &tm_frame->mc_gregs[PT_MSR]))
 		return 1;
 
-	if (sigret) {
-		/* Set up the sigreturn trampoline: li 0,sigret; sc */
-		if (__put_user(PPC_INST_ADDI + sigret, &frame->tramp[0])
-		    || __put_user(PPC_INST_SC, &frame->tramp[1]))
-			return 1;
-		flush_icache_range((unsigned long) &frame->tramp[0],
-				   (unsigned long) &frame->tramp[2]);
-	}
-
 	return 0;
 }
 
@@ -342,10 +329,8 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
  *
  * See save_user_regs() and signal_64.c:setup_tm_sigcontexts().
  */
-static int save_tm_user_regs(struct pt_regs *regs,
-			     struct mcontext __user *frame,
-			     struct mcontext __user *tm_frame, int sigret,
-			     unsigned long msr)
+static int save_tm_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
+			     struct mcontext __user *tm_frame, unsigned long msr)
 {
 	WARN_ON(tm_suspend_disabled);
 
@@ -461,14 +446,6 @@ static int save_tm_user_regs(struct pt_regs *regs,
 
 	if (__put_user(msr, &frame->mc_gregs[PT_MSR]))
 		return 1;
-	if (sigret) {
-		/* Set up the sigreturn trampoline: li 0,sigret; sc */
-		if (__put_user(PPC_INST_ADDI + sigret, &frame->tramp[0])
-		    || __put_user(PPC_INST_SC, &frame->tramp[1]))
-			return 1;
-		flush_icache_range((unsigned long) &frame->tramp[0],
-				   (unsigned long) &frame->tramp[2]);
-	}
 
 	return 0;
 }
@@ -755,7 +732,6 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
 	struct mcontext __user *mctx;
 	struct mcontext __user *tm_mctx = NULL;
 	unsigned long newsp = 0;
-	int sigret;
 	unsigned long tramp;
 	struct pt_regs *regs = tsk->thread.regs;
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
@@ -782,11 +758,15 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
 
 	/* Save user registers on the stack */
 	if (vdso32_rt_sigtramp && tsk->mm->context.vdso_base) {
-		sigret = 0;
 		tramp = tsk->mm->context.vdso_base + vdso32_rt_sigtramp;
 	} else {
-		sigret = __NR_rt_sigreturn;
-		tramp = (unsigned long)mctx->tramp;
+		tramp = (unsigned long)mctx->mc_pad;
+		/* Set up the sigreturn trampoline: li r0,sigret; sc */
+		if (__put_user(PPC_INST_ADDI + __NR_sigreturn, &mctx->mc_pad[0]))
+			goto badframe;
+		if (__put_user(PPC_INST_SC, &mctx->mc_pad[1]))
+			goto badframe;
+		flush_icache_range(tramp, tramp + 2 * sizeof(unsigned long));
 	}
 
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
@@ -796,7 +776,7 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
 		    __put_user((unsigned long)tm_mctx,
 			       &frame->uc_transact.uc_regs))
 			goto badframe;
-		if (save_tm_user_regs(regs, mctx, tm_mctx, sigret, msr))
+		if (save_tm_user_regs(regs, mctx, tm_mctx, msr))
 			goto badframe;
 	}
 	else
@@ -804,7 +784,7 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
 	{
 		if (__put_user(0, &frame->uc.uc_link))
 			goto badframe;
-		if (save_user_regs(regs, mctx, tm_mctx, sigret, 1))
+		if (save_user_regs(regs, mctx, tm_mctx, 1))
 			goto badframe;
 	}
 	regs->link = tramp;
@@ -847,7 +827,6 @@ int handle_signal32(struct ksignal *ksig, sigset_t *oldset,
 	struct mcontext __user *mctx;
 	struct mcontext __user *tm_mctx = NULL;
 	unsigned long newsp = 0;
-	int sigret;
 	unsigned long tramp;
 	struct pt_regs *regs = tsk->thread.regs;
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
@@ -880,22 +859,26 @@ int handle_signal32(struct ksignal *ksig, sigset_t *oldset,
 		goto badframe;
 
 	if (vdso32_sigtramp && tsk->mm->context.vdso_base) {
-		sigret = 0;
 		tramp = tsk->mm->context.vdso_base + vdso32_sigtramp;
 	} else {
-		sigret = __NR_sigreturn;
-		tramp = (unsigned long)mctx->tramp;
+		tramp = (unsigned long)mctx->mc_pad;
+		/* Set up the sigreturn trampoline: li r0,sigret; sc */
+		if (__put_user(PPC_INST_ADDI + __NR_sigreturn, &mctx->mc_pad[0]))
+			goto badframe;
+		if (__put_user(PPC_INST_SC, &mctx->mc_pad[1]))
+			goto badframe;
+		flush_icache_range(tramp, tramp + 2 * sizeof(unsigned long));
 	}
 
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 	if (MSR_TM_ACTIVE(msr)) {
-		if (save_tm_user_regs(regs, mctx, tm_mctx, sigret, msr))
+		if (save_tm_user_regs(regs, mctx, tm_mctx, msr))
 			goto badframe;
 	}
 	else
 #endif
 	{
-		if (save_user_regs(regs, mctx, tm_mctx, sigret, 1))
+		if (save_user_regs(regs, mctx, tm_mctx, 1))
 			goto badframe;
 	}
 
@@ -1047,7 +1030,7 @@ SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
 		mctx = (struct mcontext __user *)
 			((unsigned long) &old_ctx->uc_mcontext & ~0xfUL);
 		if (!access_ok(old_ctx, ctx_size)
-		    || save_user_regs(regs, mctx, NULL, 0, ctx_has_vsx_region)
+		    || save_user_regs(regs, mctx, NULL, ctx_has_vsx_region)
 		    || put_sigset_t(&old_ctx->uc_sigmask, &current->blocked)
 		    || __put_user(to_user_ptr(mctx), &old_ctx->uc_regs))
 			return -EFAULT;
-- 
2.25.0


  parent reply	other threads:[~2020-08-18 17:20 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-18 17:19 [PATCH v2 00/25] powerpc: Switch signal 32 to using unsafe_put_user() and friends Christophe Leroy
2020-08-18 17:19 ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 01/25] powerpc/signal: Move inline functions in signal.h Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 02/25] powerpc/ptrace: Move declaration of ptrace_get_reg() and ptrace_set_reg() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 03/25] powerpc/ptrace: Consolidate reg index calculation Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 04/25] powerpc/ptrace: Create ptrace_get_fpr() and ptrace_put_fpr() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 05/25] powerpc/signal: Don't manage floating point regs when no FPU Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 06/25] powerpc/32s: Allow deselecting CONFIG_PPC_FPU on mpc832x Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 07/25] powerpc/signal: Remove BUG_ON() in handler_signal functions Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 08/25] powerpc/signal: Move access_ok() out of get_sigframe() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 09/25] powerpc/signal: Remove get_clean_sp() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 10/25] powerpc/signal: Call get_tm_stackpointer() from get_sigframe() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 11/25] powerpc/signal: Refactor bad frame logging Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-19  1:19   ` Joe Perches
2020-08-19  1:19     ` Joe Perches
2020-08-18 17:19 ` [PATCH v2 12/25] powerpc/signal32: Simplify logging in handle_rt_signal32() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 13/25] powerpc/signal32: Move handle_signal32() close to handle_rt_signal32() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 14/25] powerpc/signal32: Rename local pointers in handle_rt_signal32() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 15/25] powerpc/signal32: Misc changes to make handle_[rt_]_signal32() more similar Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` Christophe Leroy [this message]
2020-08-18 17:19   ` [PATCH v2 16/25] powerpc/signal32: Move signal trampoline setup to handle_[rt_]signal32 Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 17/25] powerpc/signal32: Switch handle_signal32() to user_access_begin() logic Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 18/25] powerpc/signal32: Switch handle_rt_signal32() " Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 19/25] powerpc/signal32: Remove ifdefery in middle of if/else Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 20/25] signal: Add unsafe_put_compat_sigset() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 21/25] powerpc/signal32: Add and use unsafe_put_sigset_t() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 22/25] powerpc/signal32: Switch swap_context() to user_access_begin() logic Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 23/25] powerpc/signal: Create 'unsafe' versions of copy_[ck][fpr/vsx]_to_user() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-09-29  2:04   ` Christopher M. Riedl
2020-09-29  2:04     ` Christopher M. Riedl
2020-09-29  5:22     ` Christophe Leroy
2020-09-29  5:33       ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 24/25] powerpc/signal32: Isolate non-copy actions in save_user_regs() and save_tm_user_regs() Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-18 17:19 ` [PATCH v2 25/25] powerpc/signal32: Transform save_user_regs() and save_tm_user_regs() in 'unsafe' version Christophe Leroy
2020-08-18 17:19   ` Christophe Leroy
2020-08-27  9:07   ` kernel test robot
2020-08-27 15:59     ` Christophe Leroy
2020-09-29  2:55   ` Christopher M. Riedl
2020-09-29  2:55     ` Christopher M. Riedl
2020-09-29  5:21     ` Christophe Leroy
2020-12-10 11:29 ` [PATCH v2 00/25] powerpc: Switch signal 32 to using unsafe_put_user() and friends Michael Ellerman
2020-12-10 11:29   ` Michael Ellerman

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=e439cc0fa35aa45da6776520777a61848b92fd4b.1597770847.git.christophe.leroy@csgroup.eu \
    --to=christophe.leroy@csgroup.eu \
    --cc=benh@kernel.crashing.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=mpe@ellerman.id.au \
    --cc=paulus@samba.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.