[PATCH 0/9] treewide: convert vprintk uses to %pV

[PATCH 0/9] treewide: convert vprintk uses to %pV

[Joe Perches]

Multiple secessive calls to printk can be interleaved.
Avoid this possible interleaving by using %pV

Joe Perches (9):
  drivers/gpu/drm/drm_stub.c: Use printf extension %pV
  drivers/isdn/mISDN: Use printf extension %pV
  drivers/net/wireless/ath/debug.c: Use printf extension %pV
  drivers/net/wireless/b43/main.c: Use printf extension %pV
  drivers/net/wireless/b43legacy/main.c: Use printf extension %pV
  fs/gfs2/glock.c: Use printf extension %pV
  fs/nilfs2/super.c: Use printf extension %pV
  fs/quota/dquot.c: Use printf extension %pV
  net/sunrpc/svc.c: Use printf extension %pV

 drivers/gpu/drm/drm_stub.c            |   14 +++++++--
 drivers/isdn/mISDN/layer1.c           |   10 +++++--
 drivers/isdn/mISDN/layer2.c           |   12 ++++++--
 drivers/isdn/mISDN/tei.c              |   23 +++++++++++----
 drivers/net/wireless/ath/debug.c      |    9 +++++-
 drivers/net/wireless/b43/main.c       |   48 ++++++++++++++++++++++++--------
 drivers/net/wireless/b43legacy/main.c |   47 ++++++++++++++++++++++++--------
 fs/gfs2/glock.c                       |    9 +++++-
 fs/nilfs2/super.c                     |   23 +++++++++++-----
 fs/quota/dquot.c                      |   12 +++++---
 net/sunrpc/svc.c                      |   12 +++++---
 11 files changed, 161 insertions(+), 58 deletions(-)

-- 
1.7.3.1.g432b3.dirty

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[PATCH 2/9] drivers/isdn/mISDN: Use printf extension %pV

[Joe Perches]

Using %pV reduces the number of printk calls and
eliminates any possible message interleaving from
other printk calls.

Signed-off-by: Joe Perches <joe@perches.com>
---
 drivers/isdn/mISDN/layer1.c |   10 +++++++---
 drivers/isdn/mISDN/layer2.c |   12 +++++++++---
 drivers/isdn/mISDN/tei.c    |   23 +++++++++++++++++------
 3 files changed, 33 insertions(+), 12 deletions(-)

diff --git a/drivers/isdn/mISDN/layer1.c b/drivers/isdn/mISDN/layer1.c
index ac4aa18..5cc7c00 100644
--- a/drivers/isdn/mISDN/layer1.c
+++ b/drivers/isdn/mISDN/layer1.c
@@ -99,12 +99,16 @@ static void
 l1m_debug(struct FsmInst *fi, char *fmt, ...)
 {
 	struct layer1 *l1 = fi->userdata;
+	struct va_format vaf;
 	va_list va;
 
 	va_start(va, fmt);
-	printk(KERN_DEBUG "%s: ", dev_name(&l1->dch->dev.dev));
-	vprintk(fmt, va);
-	printk("\n");
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	printk(KERN_DEBUG "%s: %pV\n", dev_name(&l1->dch->dev.dev), &vaf);
+
 	va_end(va);
 }
 
diff --git a/drivers/isdn/mISDN/layer2.c b/drivers/isdn/mISDN/layer2.c
index c973717..4ae7505 100644
--- a/drivers/isdn/mISDN/layer2.c
+++ b/drivers/isdn/mISDN/layer2.c
@@ -95,14 +95,20 @@ static void
 l2m_debug(struct FsmInst *fi, char *fmt, ...)
 {
 	struct layer2 *l2 = fi->userdata;
+	struct va_format vaf;
 	va_list va;
 
 	if (!(*debug & DEBUG_L2_FSM))
 		return;
+
 	va_start(va, fmt);
-	printk(KERN_DEBUG "l2 (sapi %d tei %d): ", l2->sapi, l2->tei);
-	vprintk(fmt, va);
-	printk("\n");
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	printk(KERN_DEBUG "l2 (sapi %d tei %d): %pV\n",
+	       l2->sapi, l2->tei, &vaf);
+
 	va_end(va);
 }
 
diff --git a/drivers/isdn/mISDN/tei.c b/drivers/isdn/mISDN/tei.c
index 1b85d9d..687c9b6 100644
--- a/drivers/isdn/mISDN/tei.c
+++ b/drivers/isdn/mISDN/tei.c
@@ -79,14 +79,19 @@ static void
 da_debug(struct FsmInst *fi, char *fmt, ...)
 {
 	struct manager	*mgr = fi->userdata;
+	struct va_format vaf;
 	va_list va;
 
 	if (!(*debug & DEBUG_L2_TEIFSM))
 		return;
+
 	va_start(va, fmt);
-	printk(KERN_DEBUG "mgr(%d): ", mgr->ch.st->dev->id);
-	vprintk(fmt, va);
-	printk("\n");
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	printk(KERN_DEBUG "mgr(%d): %pV\n", mgr->ch.st->dev->id, &vaf);
+
 	va_end(va);
 }
 
@@ -223,14 +228,20 @@ static void
 tei_debug(struct FsmInst *fi, char *fmt, ...)
 {
 	struct teimgr	*tm = fi->userdata;
+	struct va_format vaf;
 	va_list va;
 
 	if (!(*debug & DEBUG_L2_TEIFSM))
 		return;
+
 	va_start(va, fmt);
-	printk(KERN_DEBUG "sapi(%d) tei(%d): ", tm->l2->sapi, tm->l2->tei);
-	vprintk(fmt, va);
-	printk("\n");
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	printk(KERN_DEBUG "sapi(%d) tei(%d): %pV\n",
+	       tm->l2->sapi, tm->l2->tei, &vaf);
+
 	va_end(va);
 }
 
-- 
1.7.3.1.g432b3.dirty

Re: [PATCH 2/9] drivers/isdn/mISDN: Use printf extension %pV

[David Miller]

From: Joe Perches <joe@perches.com>
Date: Tue,  9 Nov 2010 16:35:16 -0800

> Using %pV reduces the number of printk calls and
> eliminates any possible message interleaving from
> other printk calls.
> 
> Signed-off-by: Joe Perches <joe@perches.com>

Applied, thanks.

[PATCH 3/9] drivers/net/wireless/ath/debug.c: Use printf extension %pV

[Joe Perches]

Using %pV reduces the number of printk calls and
eliminates any possible message interleaving from
other printk calls.

Signed-off-by: Joe Perches <joe@perches.com>
---
 drivers/net/wireless/ath/debug.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/debug.c b/drivers/net/wireless/ath/debug.c
index dacfb23..a9600ba 100644
--- a/drivers/net/wireless/ath/debug.c
+++ b/drivers/net/wireless/ath/debug.c
@@ -19,14 +19,19 @@
 
 void ath_print(struct ath_common *common, int dbg_mask, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	if (likely(!(common->debug_mask & dbg_mask)))
 		return;
 
 	va_start(args, fmt);
-	printk(KERN_DEBUG "ath: ");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_DEBUG "ath: %pV", &vaf);
+
 	va_end(args);
 }
 EXPORT_SYMBOL(ath_print);
-- 
1.7.3.1.g432b3.dirty

[PATCH 4/9] drivers/net/wireless/b43/main.c: Use printf extension %pV

[Joe Perches]

Using %pV reduces the number of printk calls and
eliminates any possible message interleaving from
other printk calls.

Signed-off-by: Joe Perches <joe@perches.com>
---
 drivers/net/wireless/b43/main.c |   48 +++++++++++++++++++++++++++++---------
 1 files changed, 36 insertions(+), 12 deletions(-)

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index a118652..fa48803 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -322,59 +322,83 @@ static int b43_ratelimit(struct b43_wl *wl)
 
 void b43info(struct b43_wl *wl, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	if (b43_modparam_verbose < B43_VERBOSITY_INFO)
 		return;
 	if (!b43_ratelimit(wl))
 		return;
+
 	va_start(args, fmt);
-	printk(KERN_INFO "b43-%s: ",
-	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_INFO "b43-%s: %pV",
+	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
+
 	va_end(args);
 }
 
 void b43err(struct b43_wl *wl, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	if (b43_modparam_verbose < B43_VERBOSITY_ERROR)
 		return;
 	if (!b43_ratelimit(wl))
 		return;
+
 	va_start(args, fmt);
-	printk(KERN_ERR "b43-%s ERROR: ",
-	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_ERR "b43-%s ERROR: %pV",
+	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
+
 	va_end(args);
 }
 
 void b43warn(struct b43_wl *wl, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	if (b43_modparam_verbose < B43_VERBOSITY_WARN)
 		return;
 	if (!b43_ratelimit(wl))
 		return;
+
 	va_start(args, fmt);
-	printk(KERN_WARNING "b43-%s warning: ",
-	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_WARNING "b43-%s warning: %pV",
+	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
+
 	va_end(args);
 }
 
 void b43dbg(struct b43_wl *wl, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	if (b43_modparam_verbose < B43_VERBOSITY_DEBUG)
 		return;
+
 	va_start(args, fmt);
-	printk(KERN_DEBUG "b43-%s debug: ",
-	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_DEBUG "b43-%s debug: %pV",
+	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
+
 	va_end(args);
 }
 
-- 
1.7.3.1.g432b3.dirty

[PATCH 5/9] drivers/net/wireless/b43legacy/main.c: Use printf extension %pV

[Joe Perches]

Using %pV reduces the number of printk calls and
eliminates any possible message interleaving from
other printk calls.

Signed-off-by: Joe Perches <joe@perches.com>
---
 drivers/net/wireless/b43legacy/main.c |   47 ++++++++++++++++++++++++--------
 1 files changed, 35 insertions(+), 12 deletions(-)

diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c
index 67f18ec..1f11e16 100644
--- a/drivers/net/wireless/b43legacy/main.c
+++ b/drivers/net/wireless/b43legacy/main.c
@@ -181,52 +181,75 @@ static int b43legacy_ratelimit(struct b43legacy_wl *wl)
 
 void b43legacyinfo(struct b43legacy_wl *wl, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	if (!b43legacy_ratelimit(wl))
 		return;
+
 	va_start(args, fmt);
-	printk(KERN_INFO "b43legacy-%s: ",
-	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_INFO "b43legacy-%s: %pV",
+	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
+
 	va_end(args);
 }
 
 void b43legacyerr(struct b43legacy_wl *wl, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	if (!b43legacy_ratelimit(wl))
 		return;
+
 	va_start(args, fmt);
-	printk(KERN_ERR "b43legacy-%s ERROR: ",
-	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_ERR "b43legacy-%s ERROR: %pV",
+	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
+
 	va_end(args);
 }
 
 void b43legacywarn(struct b43legacy_wl *wl, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	if (!b43legacy_ratelimit(wl))
 		return;
+
 	va_start(args, fmt);
-	printk(KERN_WARNING "b43legacy-%s warning: ",
-	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_WARNING "b43legacy-%s warning: %pV",
+	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
+
 	va_end(args);
 }
 
 #if B43legacy_DEBUG
 void b43legacydbg(struct b43legacy_wl *wl, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	va_start(args, fmt);
-	printk(KERN_DEBUG "b43legacy-%s debug: ",
-	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
-	vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_DEBUG "b43legacy-%s debug: %pV",
+	       (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
+
 	va_end(args);
 }
 #endif /* DEBUG */
-- 
1.7.3.1.g432b3.dirty

[PATCH 9/9] net/sunrpc/svc.c: Use printf extension %pV

[Joe Perches]

Using %pV reduces the number of printk calls and
eliminates any possible message interleaving from
other printk calls.

Signed-off-by: Joe Perches <joe-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org>
---
 net/sunrpc/svc.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 6359c42..e28ddb3 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -962,6 +962,7 @@ static int
 __attribute__ ((format (printf, 2, 3)))
 svc_printk(struct svc_rqst *rqstp, const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 	int 	r;
 	char 	buf[RPC_MAX_ADDRBUFLEN];
@@ -969,11 +970,14 @@ svc_printk(struct svc_rqst *rqstp, const char *fmt, ...)
 	if (!net_ratelimit())
 		return 0;
 
-	printk(KERN_WARNING "svc: %s: ",
-		svc_print_addr(rqstp, buf, sizeof(buf)));
-
 	va_start(args, fmt);
-	r = vprintk(fmt, args);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	r = printk(KERN_WARNING "svc: %s: %pV",
+		   svc_print_addr(rqstp, buf, sizeof(buf)), &vaf);
+
 	va_end(args);
 
 	return r;
-- 
1.7.3.1.g432b3.dirty

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Re: [PATCH 0/9] treewide: convert vprintk uses to %pV

[Luis R. Rodriguez]

On Tue, Nov 9, 2010 at 4:35 PM, Joe Perches <joe-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org> wrote:
> Multiple secessive calls to printk can be interleaved.
> Avoid this possible interleaving by using %pV
>
> Joe Perches (9):
>  drivers/gpu/drm/drm_stub.c: Use printf extension %pV
>  drivers/isdn/mISDN: Use printf extension %pV
>  drivers/net/wireless/ath/debug.c: Use printf extension %pV
>  drivers/net/wireless/b43/main.c: Use printf extension %pV
>  drivers/net/wireless/b43legacy/main.c: Use printf extension %pV
>  fs/gfs2/glock.c: Use printf extension %pV
>  fs/nilfs2/super.c: Use printf extension %pV
>  fs/quota/dquot.c: Use printf extension %pV
>  net/sunrpc/svc.c: Use printf extension %pV
>
>  drivers/gpu/drm/drm_stub.c            |   14 +++++++--
>  drivers/isdn/mISDN/layer1.c           |   10 +++++--
>  drivers/isdn/mISDN/layer2.c           |   12 ++++++--
>  drivers/isdn/mISDN/tei.c              |   23 +++++++++++----
>  drivers/net/wireless/ath/debug.c      |    9 +++++-
>  drivers/net/wireless/b43/main.c       |   48 ++++++++++++++++++++++++--------
>  drivers/net/wireless/b43legacy/main.c |   47 ++++++++++++++++++++++++--------
>  fs/gfs2/glock.c                       |    9 +++++-
>  fs/nilfs2/super.c                     |   23 +++++++++++-----
>  fs/quota/dquot.c                      |   12 +++++---
>  net/sunrpc/svc.c                      |   12 +++++---
>  11 files changed, 161 insertions(+), 58 deletions(-)

When was this added upstream BTW? I ask for backport considerations.

  Luis
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Re: [PATCH 0/9] treewide: convert vprintk uses to %pV

[Joe Perches]

On Wed, 2010-11-10 at 14:48 -0800, Luis R. Rodriguez wrote:
> When was this added upstream BTW? I ask for backport considerations.

commit 7db6f5fb65a82af03229eef104dc9899c5eecf33
Author: Joe Perches <joe-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org>
Date:   Sun Jun 27 01:02:33 2010 +0000

    vsprintf: Recursive vsnprintf: Add "%pV", struct va_format
    
    Add the ability to print a format and va_list from a structure pointer
    
    Allows __dev_printk to be implemented as a single printk while
    minimizing string space duplication.
    
    %pV should not be used without some mechanism to verify the
    format and argument use ala __attribute__(format (printf(...))).
    
    Signed-off-by: Joe Perches <joe-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org>
    Acked-by: Greg Kroah-Hartman <gregkh-l3A5Bk7waGM@public.gmane.org>
    Signed-off-by: David S. Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>


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