The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From d48ebb24866edea2c35be02a878f25bc65529370 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org>
Date: Sun, 18 Nov 2018 17:26:35 -0500
Subject: [PATCH] nds32: function_graph: Simplify with function_graph_enter()
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().
Have nds32 use the new code, and remove the shadow stack management as well as
having to set up the trace structure.
This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.
Cc: Greentime Hu <greentime(a)andestech.com>
Cc: stable(a)kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org>
diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c
index a0a9679ad5de..8a41372551ff 100644
--- a/arch/nds32/kernel/ftrace.c
+++ b/arch/nds32/kernel/ftrace.c
@@ -211,29 +211,15 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
unsigned long frame_pointer)
{
unsigned long return_hooker = (unsigned long)&return_to_handler;
- struct ftrace_graph_ent trace;
unsigned long old;
- int err;
if (unlikely(atomic_read(¤t->tracing_graph_pause)))
return;
old = *parent;
- trace.func = self_addr;
- trace.depth = current->curr_ret_stack + 1;
-
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace))
- return;
-
- err = ftrace_push_return_trace(old, self_addr, &trace.depth,
- frame_pointer, NULL);
-
- if (err == -EBUSY)
- return;
-
- *parent = return_hooker;
+ if (!function_graph_enter(old, self_addr, frame_pointer, NULL))
+ *parent = return_hooker;
}
noinline void ftrace_graph_caller(void)
The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From d48ebb24866edea2c35be02a878f25bc65529370 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org>
Date: Sun, 18 Nov 2018 17:26:35 -0500
Subject: [PATCH] nds32: function_graph: Simplify with function_graph_enter()
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().
Have nds32 use the new code, and remove the shadow stack management as well as
having to set up the trace structure.
This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.
Cc: Greentime Hu <greentime(a)andestech.com>
Cc: stable(a)kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org>
diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c
index a0a9679ad5de..8a41372551ff 100644
--- a/arch/nds32/kernel/ftrace.c
+++ b/arch/nds32/kernel/ftrace.c
@@ -211,29 +211,15 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
unsigned long frame_pointer)
{
unsigned long return_hooker = (unsigned long)&return_to_handler;
- struct ftrace_graph_ent trace;
unsigned long old;
- int err;
if (unlikely(atomic_read(¤t->tracing_graph_pause)))
return;
old = *parent;
- trace.func = self_addr;
- trace.depth = current->curr_ret_stack + 1;
-
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace))
- return;
-
- err = ftrace_push_return_trace(old, self_addr, &trace.depth,
- frame_pointer, NULL);
-
- if (err == -EBUSY)
- return;
-
- *parent = return_hooker;
+ if (!function_graph_enter(old, self_addr, frame_pointer, NULL))
+ *parent = return_hooker;
}
noinline void ftrace_graph_caller(void)
The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From d48ebb24866edea2c35be02a878f25bc65529370 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org>
Date: Sun, 18 Nov 2018 17:26:35 -0500
Subject: [PATCH] nds32: function_graph: Simplify with function_graph_enter()
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().
Have nds32 use the new code, and remove the shadow stack management as well as
having to set up the trace structure.
This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.
Cc: Greentime Hu <greentime(a)andestech.com>
Cc: stable(a)kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org>
diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c
index a0a9679ad5de..8a41372551ff 100644
--- a/arch/nds32/kernel/ftrace.c
+++ b/arch/nds32/kernel/ftrace.c
@@ -211,29 +211,15 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
unsigned long frame_pointer)
{
unsigned long return_hooker = (unsigned long)&return_to_handler;
- struct ftrace_graph_ent trace;
unsigned long old;
- int err;
if (unlikely(atomic_read(¤t->tracing_graph_pause)))
return;
old = *parent;
- trace.func = self_addr;
- trace.depth = current->curr_ret_stack + 1;
-
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace))
- return;
-
- err = ftrace_push_return_trace(old, self_addr, &trace.depth,
- frame_pointer, NULL);
-
- if (err == -EBUSY)
- return;
-
- *parent = return_hooker;
+ if (!function_graph_enter(old, self_addr, frame_pointer, NULL))
+ *parent = return_hooker;
}
noinline void ftrace_graph_caller(void)
The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 07f7175b43827640d1e69c9eded89aa089a234b4 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org>
Date: Sun, 18 Nov 2018 17:14:10 -0500
Subject: [PATCH] x86/function_graph: Simplify with function_graph_enter()
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().
Have x86 use the new code, and remove the shadow stack management as well as
having to set up the trace structure.
This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.
Cc: Thomas Gleixner <tglx(a)linutronix.de>
Cc: Ingo Molnar <mingo(a)redhat.com>
Cc: Borislav Petkov <bp(a)alien8.de>
Cc: "H. Peter Anvin" <hpa(a)zytor.com>
Cc: x86(a)kernel.org
Cc: stable(a)kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org>
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 01ebcb6f263e..7ee8067cbf45 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -994,7 +994,6 @@ void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent,
{
unsigned long old;
int faulted;
- struct ftrace_graph_ent trace;
unsigned long return_hooker = (unsigned long)
&return_to_handler;
@@ -1046,19 +1045,7 @@ void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent,
return;
}
- trace.func = self_addr;
- trace.depth = current->curr_ret_stack + 1;
-
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace)) {
+ if (function_graph_enter(old, self_addr, frame_pointer, parent))
*parent = old;
- return;
- }
-
- if (ftrace_push_return_trace(old, self_addr, &trace.depth,
- frame_pointer, parent) == -EBUSY) {
- *parent = old;
- return;
- }
}
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 556763e5a500d71879d632867b75826551acd49c Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org>
Date: Sun, 18 Nov 2018 17:23:30 -0500
Subject: [PATCH] microblaze: function_graph: Simplify with
function_graph_enter()
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().
Have microblaze use the new code, and remove the shadow stack management as well as
having to set up the trace structure.
This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.
Cc: Michal Simek <monstr(a)monstr.eu>
Cc: stable(a)kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org>
diff --git a/arch/microblaze/kernel/ftrace.c b/arch/microblaze/kernel/ftrace.c
index d57563c58a26..224eea40e1ee 100644
--- a/arch/microblaze/kernel/ftrace.c
+++ b/arch/microblaze/kernel/ftrace.c
@@ -22,8 +22,7 @@
void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
{
unsigned long old;
- int faulted, err;
- struct ftrace_graph_ent trace;
+ int faulted;
unsigned long return_hooker = (unsigned long)
&return_to_handler;
@@ -63,18 +62,8 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
return;
}
- err = ftrace_push_return_trace(old, self_addr, &trace.depth, 0, NULL);
- if (err == -EBUSY) {
+ if (function_graph_enter(old, self_addr, 0, NULL))
*parent = old;
- return;
- }
-
- trace.func = self_addr;
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace)) {
- current->curr_ret_stack--;
- *parent = old;
- }
}
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From f1f5b14afd7cce39e6a9b25c685e1ea34c231096 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org>
Date: Sun, 18 Nov 2018 17:19:26 -0500
Subject: [PATCH] ARM: function_graph: Simplify with function_graph_enter()
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().
Have ARM use the new code, and remove the shadow stack management as well as
having to set up the trace structure.
This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.
Cc: Russell King <linux(a)armlinux.org.uk>
Cc: linux-arm-kernel(a)lists.infradead.org
Cc: stable(a)kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org>
diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index 0142fcfcc3d3..bda949fd84e8 100644
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -183,9 +183,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
unsigned long frame_pointer)
{
unsigned long return_hooker = (unsigned long) &return_to_handler;
- struct ftrace_graph_ent trace;
unsigned long old;
- int err;
if (unlikely(atomic_read(¤t->tracing_graph_pause)))
return;
@@ -193,21 +191,8 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
old = *parent;
*parent = return_hooker;
- trace.func = self_addr;
- trace.depth = current->curr_ret_stack + 1;
-
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace)) {
+ if (function_graph_enter(old, self_addr, frame_pointer, NULL))
*parent = old;
- return;
- }
-
- err = ftrace_push_return_trace(old, self_addr, &trace.depth,
- frame_pointer, NULL);
- if (err == -EBUSY) {
- *parent = old;
- return;
- }
}
#ifdef CONFIG_DYNAMIC_FTRACE
Re-sending the patches with the "Cc: stable(a)vger.kernel.org" included
in the sign-off area, as per Option 1 of the rules Greg referred me
to. I hope that now I have done everything by the rules.
On Sun, 2 Dec 2018 at 21:42, Tigran Aivazian <aivazian.tigran(a)gmail.com> wrote:
>
> just wanted to add: although the subject says "4.19.6" the patches
> apply perfectly to the top of "torvalds/linux" tree from github.
> On Sun, 2 Dec 2018 at 21:01, Tigran Aivazian <aivazian.tigran(a)gmail.com> wrote:
> >
> > Hi Linus,
> >
> > I attached two incremental patches for BFS:
> >
> > 1. Make inode bitmap allocation static (applies on top of 4.19.6)
> > 2. Strengthen the superblock sanity checking code (applies on top of 1. above)
> >
> > Kind regards,
> > Tigran
Hi Sasha,
On Sun, 2018-12-02 at 06:49 +0000, Sasha Levin wrote:
> Hi,
>
> [This is an automated email]
>
> This commit has been processed because it contains a -stable tag.
> The stable tag indicates that it's relevant for the following trees: 4.4.+
>
> The bot has tested the following trees: v4.19.5, v4.14.84, v4.9.141, v4.4.165,
>
> v4.19.5: Build OK!
> v4.14.84: Build OK!
> v4.9.141: Failed to apply! Possible dependencies:
> Unable to calculate
That's a fixed hunk for 4.9:
---------------------->8----------------------
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -8,7 +8,7 @@
UTS_MACHINE := arc
-KBUILD_DEFCONFIG := nsim_700_defconfig
+KBUILD_DEFCONFIG := nsim_hs_defconfig
cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
---------------------->8----------------------
> v4.4.165: Failed to apply! Possible dependencies:
> 845033be0041 ("ARC: [plat-eznps] Add eznps board defconfig and dts")
Indeed EzChip's nps400 platform was added later but we don't need it in 4.4.y
as IIRC there were quite some other dependencies, so just drop hunk related to it.
And once nps_defconfig hunk is dropped there's a fixd hunk for arch/arc/Makefile
similarly to 4.9:
---------------------->8----------------------
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -12,7 +12,7 @@ ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE := arc-linux-
endif
-KBUILD_DEFCONFIG := nsim_700_defconfig
+KBUILD_DEFCONFIG := nsim_hs_defconfig
cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
---------------------->8----------------------
> How should we proceed with this patch?
Hope above helps. Otherwise I may send complete patches for both
4.4 and 4.9.
Let me know what is your preference.
-Alexey
The patch below does not apply to the 3.18-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 07f7175b43827640d1e69c9eded89aa089a234b4 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org>
Date: Sun, 18 Nov 2018 17:14:10 -0500
Subject: [PATCH] x86/function_graph: Simplify with function_graph_enter()
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().
Have x86 use the new code, and remove the shadow stack management as well as
having to set up the trace structure.
This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.
Cc: Thomas Gleixner <tglx(a)linutronix.de>
Cc: Ingo Molnar <mingo(a)redhat.com>
Cc: Borislav Petkov <bp(a)alien8.de>
Cc: "H. Peter Anvin" <hpa(a)zytor.com>
Cc: x86(a)kernel.org
Cc: stable(a)kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org>
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 01ebcb6f263e..7ee8067cbf45 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -994,7 +994,6 @@ void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent,
{
unsigned long old;
int faulted;
- struct ftrace_graph_ent trace;
unsigned long return_hooker = (unsigned long)
&return_to_handler;
@@ -1046,19 +1045,7 @@ void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent,
return;
}
- trace.func = self_addr;
- trace.depth = current->curr_ret_stack + 1;
-
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace)) {
+ if (function_graph_enter(old, self_addr, frame_pointer, parent))
*parent = old;
- return;
- }
-
- if (ftrace_push_return_trace(old, self_addr, &trace.depth,
- frame_pointer, parent) == -EBUSY) {
- *parent = old;
- return;
- }
}
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 07f7175b43827640d1e69c9eded89aa089a234b4 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org>
Date: Sun, 18 Nov 2018 17:14:10 -0500
Subject: [PATCH] x86/function_graph: Simplify with function_graph_enter()
The function_graph_enter() function does the work of calling the function
graph hook function and the management of the shadow stack, simplifying the
work done in the architecture dependent prepare_ftrace_return().
Have x86 use the new code, and remove the shadow stack management as well as
having to set up the trace structure.
This is needed to prepare for a fix of a design bug on how the curr_ret_stack
is used.
Cc: Thomas Gleixner <tglx(a)linutronix.de>
Cc: Ingo Molnar <mingo(a)redhat.com>
Cc: Borislav Petkov <bp(a)alien8.de>
Cc: "H. Peter Anvin" <hpa(a)zytor.com>
Cc: x86(a)kernel.org
Cc: stable(a)kernel.org
Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org>
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 01ebcb6f263e..7ee8067cbf45 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -994,7 +994,6 @@ void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent,
{
unsigned long old;
int faulted;
- struct ftrace_graph_ent trace;
unsigned long return_hooker = (unsigned long)
&return_to_handler;
@@ -1046,19 +1045,7 @@ void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent,
return;
}
- trace.func = self_addr;
- trace.depth = current->curr_ret_stack + 1;
-
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace)) {
+ if (function_graph_enter(old, self_addr, frame_pointer, parent))
*parent = old;
- return;
- }
-
- if (ftrace_push_return_trace(old, self_addr, &trace.depth,
- frame_pointer, parent) == -EBUSY) {
- *parent = old;
- return;
- }
}
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */