[PATCH RT 0/2] [ANNOUNCE] 3.2.28-rt42-rc1 stable review

[PATCH RT 0/2] [ANNOUNCE] 3.2.28-rt42-rc1 stable review

[Steven Rostedt]

Dear RT Folks,

This is the RT stable review cycle of patch 3.2.28-rt42-rc1.

Please scream at me if I messed something up. Please test the patches too.

The -rc release will be uploaded to kernel.org and will be deleted when
the final release is out. This is just a review release (or release candidate).

The pre-releases will not be pushed to the git repository, only the
final release is.

If all goes well, this patch will be converted to the next main release
on 8/29/2012 (The late Michael Jackson's B-Day, and also one of
my friends from high school, who hated Michael Jackson, and also
hated to be reminded that he shared the same B-Day).

Enjoy,

-- Steve


To build 3.2.28-rt42-rc1 directly, the following patches should be applied:

  http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.2.tar.xz

  http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.2.28.xz

  http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/patch-3.2.28-rt42-rc1.patch.xz

You can also build from 3.2.28-rt41 by applying the incremental patch:

http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/incr/patch-3.2.28-rt41-rt42-rc1.patch.xz


Changes from 3.2.28-rt41:

---


Frank Rowand (1):
      fix printk flush of messages

Steven Rostedt (1):
      Linux 3.2.27-rt41-rc1

----
 kernel/printk.c |    2 +-
 localversion-rt |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

[PATCH RT 1/2] fix printk flush of messages

[Steven Rostedt]

[-- Attachment #1: 0001-fix-printk-flush-of-messages.patch --]
[-- Type: text/plain, Size: 1780 bytes --]

Updates console-make-rt-friendly.patch

#ifdef CONFIG_PREEMPT_RT_FULL, printk() output is never flushed by
printk() because:

   # some liberties taken in this pseudo-code to make it easier to follow
   printk()
      vprintk()
         raw_spin_lock(&logbuf_lock)
            # increment preempt_count():
            preempt_disable()
      result = console_trylock_for_printk()
         retval = 0
         # lock will always be false, because preempt_count() will be >= 1
         lock = ... && !preempt_count()
         if (lock)
            retval = 1
         return retval
      # result will always be false since lock will always be false
      if (result)
         console_unlock()
            # this is where the printk() output would be flushed

On system boot some printk() output is flushed because register_console()
and tty_open() call console_unlock().

This change also fixes the problem that was previously fixed by
preempt-rt-allow-immediate-magic-sysrq-output-for-preempt_rt_full.patch

Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>
Cc: Frank <Frank_Rowand@sonyusa.com>
Link: http://lkml.kernel.org/r/4FB44FD0.4090800@am.sony.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/printk.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/printk.c b/kernel/printk.c
index 9eabbbb..66e83e5 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -836,7 +836,7 @@ static int console_trylock_for_printk(unsigned int cpu, unsigned long flags)
 	int retval = 0, wake = 0;
 #ifdef CONFIG_PREEMPT_RT_FULL
 	int lock = (!early_boot_irqs_disabled && !irqs_disabled_flags(flags) &&
-		!preempt_count()) || sysrq_in_progress;
+		(preempt_count() <= 1)) || sysrq_in_progress;
 #else
 	int lock = 1;
 #endif
-- 
1.7.10.4

[PATCH RT 2/2] Linux 3.2.27-rt41-rc1

[Steven Rostedt]

[-- Attachment #1: 0002-Linux-3.2.27-rt41-rc1.patch --]
[-- Type: text/plain, Size: 245 bytes --]

---
 localversion-rt |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/localversion-rt b/localversion-rt
index 629e0b4..31c892a 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt41
+-rt42-rc1
-- 
1.7.10.4

[PATCH RT 1/2] fix printk flush of messages

[Steven Rostedt]

[-- Attachment #1: 0001-fix-printk-flush-of-messages.patch --]
[-- Type: text/plain, Size: 4956 bytes --]

From: Frank Rowand <frank.rowand@am.sony.com>

Reverse preempt-rt-allow-immediate-magic-sysrq-output-for-preempt_rt_full.patch

The problem addressed by that patch does not exist after applying
console-make-rt-friendly-update.patch

Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>
Link: http://lkml.kernel.org/r/4FB44EF1.9050809@am.sony.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 drivers/tty/serial/cpm_uart/cpm_uart_core.c |    2 +-
 drivers/tty/sysrq.c                         |   23 -----------------------
 include/linux/sysrq.h                       |    5 -----
 kernel/printk.c                             |    5 ++---
 lib/Kconfig.debug                           |   22 ----------------------
 5 files changed, 3 insertions(+), 54 deletions(-)

diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index a8b0559..b418947 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -1226,7 +1226,7 @@ static void cpm_uart_console_write(struct console *co, const char *s,
 {
 	struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index];
 	unsigned long flags;
-	int nolock = oops_in_progress || sysrq_in_progress;
+	int nolock = oops_in_progress;
 
 	if (unlikely(nolock)) {
 		local_irq_save(flags);
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 5219738..43db715 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -492,23 +492,6 @@ static void __sysrq_put_key_op(int key, struct sysrq_key_op *op_p)
                 sysrq_key_table[i] = op_p;
 }
 
-#ifdef CONFIG_MAGIC_SYSRQ_FORCE_PRINTK
-
-int sysrq_in_progress;
-
-static void set_sysrq_in_progress(int value)
-{
-	sysrq_in_progress = value;
-}
-
-#else
-
-static void set_sysrq_in_progress(int value)
-{
-}
-
-#endif
-
 void __handle_sysrq(int key, bool check_mask)
 {
 	struct sysrq_key_op *op_p;
@@ -517,9 +500,6 @@ void __handle_sysrq(int key, bool check_mask)
 	unsigned long flags;
 
 	spin_lock_irqsave(&sysrq_key_table_lock, flags);
-
-	set_sysrq_in_progress(1);
-
 	/*
 	 * Raise the apparent loglevel to maximum so that the sysrq header
 	 * is shown to provide the user with positive feedback.  We do not
@@ -561,9 +541,6 @@ void __handle_sysrq(int key, bool check_mask)
 		printk("\n");
 		console_loglevel = orig_log_level;
 	}
-
-	set_sysrq_in_progress(0);
-
 	spin_unlock_irqrestore(&sysrq_key_table_lock, flags);
 }
 
diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
index d224c0b..7faf933 100644
--- a/include/linux/sysrq.h
+++ b/include/linux/sysrq.h
@@ -38,11 +38,6 @@ struct sysrq_key_op {
 	int enable_mask;
 };
 
-#ifdef CONFIG_MAGIC_SYSRQ_FORCE_PRINTK
-extern int sysrq_in_progress;
-#else
-#define sysrq_in_progress 0
-#endif
 #ifdef CONFIG_MAGIC_SYSRQ
 
 /* Generic SysRq interface -- you may call it from any device driver, supplying
diff --git a/kernel/printk.c b/kernel/printk.c
index 66e83e5..85d8795 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -21,7 +21,6 @@
 #include <linux/tty.h>
 #include <linux/tty_driver.h>
 #include <linux/console.h>
-#include <linux/sysrq.h>
 #include <linux/init.h>
 #include <linux/jiffies.h>
 #include <linux/nmi.h>
@@ -835,8 +834,8 @@ static int console_trylock_for_printk(unsigned int cpu, unsigned long flags)
 {
 	int retval = 0, wake = 0;
 #ifdef CONFIG_PREEMPT_RT_FULL
-	int lock = (!early_boot_irqs_disabled && !irqs_disabled_flags(flags) &&
-		(preempt_count() <= 1)) || sysrq_in_progress;
+	int lock = !early_boot_irqs_disabled && !irqs_disabled_flags(flags) &&
+		(preempt_count() <= 1);
 #else
 	int lock = 1;
 #endif
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 13a937b..c347db3 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -62,28 +62,6 @@ config MAGIC_SYSRQ
 	  keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
 	  unless you really know what this hack does.
 
-config MAGIC_SYSRQ_FORCE_PRINTK
-	bool "Force printk from Magic SysRq"
-	depends on MAGIC_SYSRQ && PREEMPT_RT_FULL
-	default n
-	help
-	  Allow the output from Magic SysRq to be output immediately, even if
-	  this causes large latencies.  This can cause performance problems
-	  for real-time processes.
-
-	  If PREEMPT_RT_FULL, printk() will not try to acquire the console lock
-	  when interrupts or preemption are disabled.  If the console lock is
-	  not acquired the printk() output will be buffered, but will not be
-	  output immediately.  Some drivers call into the Magic SysRq code
-	  with interrupts or preemption disabled, so the output of Magic SysRq
-	  will be buffered instead of printing immediately if this option is
-	  not selected.
-
-	  Even with this option selected, Magic SysRq output will be delayed
-	  if the attempt to acquire the console lock fails.
-
-	  Don't say Y unless you really know what this hack does.
-
 config STRIP_ASM_SYMS
 	bool "Strip assembler-generated symbols during link"
 	default n
-- 
1.7.10.4

[PATCH RT 1/2] fix printk flush of messages

[Steven Rostedt]

[-- Attachment #1: 0001-fix-printk-flush-of-messages.patch --]
[-- Type: text/plain, Size: 4955 bytes --]

From: Frank Rowand <frank.rowand@am.sony.com>

Reverse preempt-rt-allow-immediate-magic-sysrq-output-for-preempt_rt_full.patch

The problem addressed by that patch does not exist after applying
console-make-rt-friendly-update.patch

Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>
Link: http://lkml.kernel.org/r/4FB44EF1.9050809@am.sony.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 drivers/tty/serial/cpm_uart/cpm_uart_core.c |    2 +-
 drivers/tty/sysrq.c                         |   23 -----------------------
 include/linux/sysrq.h                       |    5 -----
 kernel/printk.c                             |    5 ++---
 lib/Kconfig.debug                           |   22 ----------------------
 5 files changed, 3 insertions(+), 54 deletions(-)

diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index 2a75c84..9488da7 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -1225,7 +1225,7 @@ static void cpm_uart_console_write(struct console *co, const char *s,
 {
 	struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index];
 	unsigned long flags;
-	int nolock = oops_in_progress || sysrq_in_progress;
+	int nolock = oops_in_progress;
 
 	if (unlikely(nolock)) {
 		local_irq_save(flags);
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 5219738..43db715 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -492,23 +492,6 @@ static void __sysrq_put_key_op(int key, struct sysrq_key_op *op_p)
                 sysrq_key_table[i] = op_p;
 }
 
-#ifdef CONFIG_MAGIC_SYSRQ_FORCE_PRINTK
-
-int sysrq_in_progress;
-
-static void set_sysrq_in_progress(int value)
-{
-	sysrq_in_progress = value;
-}
-
-#else
-
-static void set_sysrq_in_progress(int value)
-{
-}
-
-#endif
-
 void __handle_sysrq(int key, bool check_mask)
 {
 	struct sysrq_key_op *op_p;
@@ -517,9 +500,6 @@ void __handle_sysrq(int key, bool check_mask)
 	unsigned long flags;
 
 	spin_lock_irqsave(&sysrq_key_table_lock, flags);
-
-	set_sysrq_in_progress(1);
-
 	/*
 	 * Raise the apparent loglevel to maximum so that the sysrq header
 	 * is shown to provide the user with positive feedback.  We do not
@@ -561,9 +541,6 @@ void __handle_sysrq(int key, bool check_mask)
 		printk("\n");
 		console_loglevel = orig_log_level;
 	}
-
-	set_sysrq_in_progress(0);
-
 	spin_unlock_irqrestore(&sysrq_key_table_lock, flags);
 }
 
diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
index d224c0b..7faf933 100644
--- a/include/linux/sysrq.h
+++ b/include/linux/sysrq.h
@@ -38,11 +38,6 @@ struct sysrq_key_op {
 	int enable_mask;
 };
 
-#ifdef CONFIG_MAGIC_SYSRQ_FORCE_PRINTK
-extern int sysrq_in_progress;
-#else
-#define sysrq_in_progress 0
-#endif
 #ifdef CONFIG_MAGIC_SYSRQ
 
 /* Generic SysRq interface -- you may call it from any device driver, supplying
diff --git a/kernel/printk.c b/kernel/printk.c
index f2c459f..ea71fae 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -21,7 +21,6 @@
 #include <linux/tty.h>
 #include <linux/tty_driver.h>
 #include <linux/console.h>
-#include <linux/sysrq.h>
 #include <linux/init.h>
 #include <linux/jiffies.h>
 #include <linux/nmi.h>
@@ -834,8 +833,8 @@ static int console_trylock_for_printk(unsigned int cpu, unsigned long flags)
 	__releases(&logbuf_lock)
 {
 #ifdef CONFIG_PREEMPT_RT_FULL
-	int lock = (!early_boot_irqs_disabled && !irqs_disabled_flags(flags) &&
-		(preempt_count() <= 1)) || sysrq_in_progress;
+	int lock = !early_boot_irqs_disabled && !irqs_disabled_flags(flags) &&
+		(preempt_count() <= 1);
 #else
 	int lock = 1;
 #endif
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 383b565..1685473 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -62,28 +62,6 @@ config MAGIC_SYSRQ
 	  keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
 	  unless you really know what this hack does.
 
-config MAGIC_SYSRQ_FORCE_PRINTK
-	bool "Force printk from Magic SysRq"
-	depends on MAGIC_SYSRQ && PREEMPT_RT_FULL
-	default n
-	help
-	  Allow the output from Magic SysRq to be output immediately, even if
-	  this causes large latencies.  This can cause performance problems
-	  for real-time processes.
-
-	  If PREEMPT_RT_FULL, printk() will not try to acquire the console lock
-	  when interrupts or preemption are disabled.  If the console lock is
-	  not acquired the printk() output will be buffered, but will not be
-	  output immediately.  Some drivers call into the Magic SysRq code
-	  with interrupts or preemption disabled, so the output of Magic SysRq
-	  will be buffered instead of printing immediately if this option is
-	  not selected.
-
-	  Even with this option selected, Magic SysRq output will be delayed
-	  if the attempt to acquire the console lock fails.
-
-	  Don't say Y unless you really know what this hack does.
-
 config STRIP_ASM_SYMS
 	bool "Strip assembler-generated symbols during link"
 	default n
-- 
1.7.10.4

[PATCH RT 1/2] fix printk flush of messages

[Steven Rostedt]

[-- Attachment #1: 0001-fix-printk-flush-of-messages.patch --]
[-- Type: text/plain, Size: 1755 bytes --]

Updates console-make-rt-friendly.patch

#ifdef CONFIG_PREEMPT_RT_FULL, printk() output is never flushed by
printk() because:

   # some liberties taken in this pseudo-code to make it easier to follow
   printk()
      vprintk()
         raw_spin_lock(&logbuf_lock)
            # increment preempt_count():
            preempt_disable()
      result = console_trylock_for_printk()
         retval = 0
         # lock will always be false, because preempt_count() will be >= 1
         lock = ... && !preempt_count()
         if (lock)
            retval = 1
         return retval
      # result will always be false since lock will always be false
      if (result)
         console_unlock()
            # this is where the printk() output would be flushed

On system boot some printk() output is flushed because register_console()
and tty_open() call console_unlock().

This change also fixes the problem that was previously fixed by
preempt-rt-allow-immediate-magic-sysrq-output-for-preempt_rt_full.patch

Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>
Cc: Frank <Frank_Rowand@sonyusa.com>
Link: http://lkml.kernel.org/r/4FB44FD0.4090800@am.sony.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/printk.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/printk.c b/kernel/printk.c
index 60f4290..f2c459f 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -835,7 +835,7 @@ static int console_trylock_for_printk(unsigned int cpu, unsigned long flags)
 {
 #ifdef CONFIG_PREEMPT_RT_FULL
 	int lock = (!early_boot_irqs_disabled && !irqs_disabled_flags(flags) &&
-		!preempt_count()) || sysrq_in_progress;
+		(preempt_count() <= 1)) || sysrq_in_progress;
 #else
 	int lock = 1;
 #endif
-- 
1.7.10.4

[PATCH RT 1/2] fix printk flush of messages

[Frank Rowand]

Reverse preempt-rt-allow-immediate-magic-sysrq-output-for-preempt_rt_full.patch

The problem addressed by that patch does not exist after applying
console-make-rt-friendly-update.patch

Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>

---
 drivers/tty/serial/cpm_uart/cpm_uart_core.c |    2 	1 +	1 -	0 !
 drivers/tty/sysrq.c                         |   23 	0 +	23 -	0 !
 include/linux/sysrq.h                       |    5 	0 +	5 -	0 !
 kernel/printk.c                             |    5 	2 +	3 -	0 !
 lib/Kconfig.debug                           |   22 	0 +	22 -	0 !
 5 files changed, 3 insertions(+), 54 deletions(-)

Index: b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
===================================================================
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -1226,7 +1226,7 @@ static void cpm_uart_console_write(struc
 {
 	struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index];
 	unsigned long flags;
-	int nolock = oops_in_progress || sysrq_in_progress;
+	int nolock = oops_in_progress;
 
 	if (unlikely(nolock)) {
 		local_irq_save(flags);
Index: b/drivers/tty/sysrq.c
===================================================================
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -495,23 +495,6 @@ static void __sysrq_put_key_op(int key, 
                 sysrq_key_table[i] = op_p;
 }
 
-#ifdef CONFIG_MAGIC_SYSRQ_FORCE_PRINTK
-
-int sysrq_in_progress;
-
-static void set_sysrq_in_progress(int value)
-{
-	sysrq_in_progress = value;
-}
-
-#else
-
-static void set_sysrq_in_progress(int value)
-{
-}
-
-#endif
-
 void __handle_sysrq(int key, bool check_mask)
 {
 	struct sysrq_key_op *op_p;
@@ -520,9 +503,6 @@ void __handle_sysrq(int key, bool check_
 	unsigned long flags;
 
 	spin_lock_irqsave(&sysrq_key_table_lock, flags);
-
-	set_sysrq_in_progress(1);
-
 	/*
 	 * Raise the apparent loglevel to maximum so that the sysrq header
 	 * is shown to provide the user with positive feedback.  We do not
@@ -564,9 +544,6 @@ void __handle_sysrq(int key, bool check_
 		printk("\n");
 		console_loglevel = orig_log_level;
 	}
-
-	set_sysrq_in_progress(0);
-
 	spin_unlock_irqrestore(&sysrq_key_table_lock, flags);
 }
 
Index: b/include/linux/sysrq.h
===================================================================
--- a/include/linux/sysrq.h
+++ b/include/linux/sysrq.h
@@ -38,11 +38,6 @@ struct sysrq_key_op {
 	int enable_mask;
 };
 
-#ifdef CONFIG_MAGIC_SYSRQ_FORCE_PRINTK
-extern int sysrq_in_progress;
-#else
-#define sysrq_in_progress 0
-#endif
 #ifdef CONFIG_MAGIC_SYSRQ
 
 /* Generic SysRq interface -- you may call it from any device driver, supplying
Index: b/kernel/printk.c
===================================================================
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -21,7 +21,6 @@
 #include <linux/tty.h>
 #include <linux/tty_driver.h>
 #include <linux/console.h>
-#include <linux/sysrq.h>
 #include <linux/init.h>
 #include <linux/jiffies.h>
 #include <linux/nmi.h>
@@ -847,8 +846,8 @@ static int console_trylock_for_printk(un
 {
 	int retval = 0, wake = 0;
 #ifdef CONFIG_PREEMPT_RT_FULL
-	int lock = (!early_boot_irqs_disabled && !irqs_disabled_flags(flags) &&
-		!preempt_count()) || sysrq_in_progress;
+	int lock = !early_boot_irqs_disabled && !irqs_disabled_flags(flags) &&
+		!preempt_count();
 #else
 	int lock = 1;
 #endif
Index: b/lib/Kconfig.debug
===================================================================
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -62,28 +62,6 @@ config MAGIC_SYSRQ
 	  keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
 	  unless you really know what this hack does.
 
-config MAGIC_SYSRQ_FORCE_PRINTK
-	bool "Force printk from Magic SysRq"
-	depends on MAGIC_SYSRQ && PREEMPT_RT_FULL
-	default n
-	help
-	  Allow the output from Magic SysRq to be output immediately, even if
-	  this causes large latencies.  This can cause performance problems
-	  for real-time processes.
-
-	  If PREEMPT_RT_FULL, printk() will not try to acquire the console lock
-	  when interrupts or preemption are disabled.  If the console lock is
-	  not acquired the printk() output will be buffered, but will not be
-	  output immediately.  Some drivers call into the Magic SysRq code
-	  with interrupts or preemption disabled, so the output of Magic SysRq
-	  will be buffered instead of printing immediately if this option is
-	  not selected.
-
-	  Even with this option selected, Magic SysRq output will be delayed
-	  if the attempt to acquire the console lock fails.
-
-	  Don't say Y unless you really know what this hack does.
-
 config STRIP_ASM_SYMS
 	bool "Strip assembler-generated symbols during link"
 	default n