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Linux 3.3-rc4-git5 (upstream b52b80023f262ce8a0ffdcb490acb23e8678377a)

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This commit is contained in:
Josh Boyer 2012-02-25 08:19:03 -05:00
parent 9007bbd9ca
commit 7e4a1e0b31
4 changed files with 41 additions and 204 deletions
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105
imon-dont-wedge-hardware-after-early-callbacks.patch
View File

@ -1,105 +0,0 @@
From 8791d63af0cf113725ae4cb8cba9492814c59a93 Mon Sep 17 00:00:00 2001
From: Jarod Wilson <jarod@redhat.com>
Date: Thu, 26 Jan 2012 12:04:11 -0300
Subject: [PATCH] [media] imon: don't wedge hardware after early callbacks
This patch is just a minor update to one titled "imon: Input from ffdc
device type ignored" from Corinna Vinschen. An earlier patch to prevent
an oops when we got early callbacks also has the nasty side-effect of
wedging imon hardware, as we don't acknowledge the urb. Rework the check
slightly here to bypass processing the packet, as the driver isn't yet
fully initialized, but still acknowlege the urb and submit a new rx_urb.
Do this for both interfaces -- irrelevant for ffdc hardware, but
relevant for newer hardware, though newer hardware doesn't spew the
constant stream of data as soon as the hardware is initialized like the
older ffdc devices, so they'd be less likely to trigger this anyway...
Tested with both an ffdc device and an 0042 device.
Reported-by: Corinna Vinschen <vinschen@redhat.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
CC: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/media/rc/imon.c | 26 ++++++++++++++++++++++----
1 files changed, 22 insertions(+), 4 deletions(-)
diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c
index 6ed9646..3f175eb 100644
--- a/drivers/media/rc/imon.c
+++ b/drivers/media/rc/imon.c
@@ -47,7 +47,7 @@
#define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
#define MOD_NAME "imon"
-#define MOD_VERSION "0.9.3"
+#define MOD_VERSION "0.9.4"
#define DISPLAY_MINOR_BASE 144
#define DEVICE_NAME "lcd%d"
@@ -1658,9 +1658,17 @@ static void usb_rx_callback_intf0(struct urb *urb)
return;
ictx = (struct imon_context *)urb->context;
- if (!ictx || !ictx->dev_present_intf0)
+ if (!ictx)
return;
+ /*
+ * if we get a callback before we're done configuring the hardware, we
+ * can't yet process the data, as there's nowhere to send it, but we
+ * still need to submit a new rx URB to avoid wedging the hardware
+ */
+ if (!ictx->dev_present_intf0)
+ goto out;
+
switch (urb->status) {
case -ENOENT: /* usbcore unlink successful! */
return;
@@ -1678,6 +1686,7 @@ static void usb_rx_callback_intf0(struct urb *urb)
break;
}
+out:
usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
}
@@ -1690,9 +1699,17 @@ static void usb_rx_callback_intf1(struct urb *urb)
return;
ictx = (struct imon_context *)urb->context;
- if (!ictx || !ictx->dev_present_intf1)
+ if (!ictx)
return;
+ /*
+ * if we get a callback before we're done configuring the hardware, we
+ * can't yet process the data, as there's nowhere to send it, but we
+ * still need to submit a new rx URB to avoid wedging the hardware
+ */
+ if (!ictx->dev_present_intf1)
+ goto out;
+
switch (urb->status) {
case -ENOENT: /* usbcore unlink successful! */
return;
@@ -1710,6 +1727,7 @@ static void usb_rx_callback_intf1(struct urb *urb)
break;
}
+out:
usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
}
@@ -2242,7 +2260,7 @@ find_endpoint_failed:
mutex_unlock(&ictx->lock);
usb_free_urb(rx_urb);
rx_urb_alloc_failed:
- dev_err(ictx->dev, "unable to initialize intf0, err %d\n", ret);
+ dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
return NULL;
}
--
1.7.2.5

7
kernel.spec
View File

@ -87,7 +87,7 @@ Summary: The Linux kernel
# The rc snapshot level # The rc snapshot level
%define rcrev 4 %define rcrev 4
# The git snapshot level # The git snapshot level
%define gitrev 4 %define gitrev 5
# Set rpm version accordingly # Set rpm version accordingly
%define rpmversion 3.%{upstream_sublevel}.0 %define rpmversion 3.%{upstream_sublevel}.0
%endif %endif
@ -716,7 +716,6 @@ Patch2802: linux-2.6-silence-acpi-blacklist.patch
Patch2899: linux-2.6-v4l-dvb-fixes.patch Patch2899: linux-2.6-v4l-dvb-fixes.patch
Patch2900: linux-2.6-v4l-dvb-update.patch Patch2900: linux-2.6-v4l-dvb-update.patch
Patch2901: linux-2.6-v4l-dvb-experimental.patch Patch2901: linux-2.6-v4l-dvb-experimental.patch
Patch2902: imon-dont-wedge-hardware-after-early-callbacks.patch
# fs fixes # fs fixes
Patch4000: ext4-fix-resize-when-resizing-within-single-group.patch Patch4000: ext4-fix-resize-when-resizing-within-single-group.patch
@ -1447,7 +1446,6 @@ ApplyPatch quite-apm.patch
ApplyOptionalPatch linux-2.6-v4l-dvb-fixes.patch ApplyOptionalPatch linux-2.6-v4l-dvb-fixes.patch
ApplyOptionalPatch linux-2.6-v4l-dvb-update.patch ApplyOptionalPatch linux-2.6-v4l-dvb-update.patch
ApplyOptionalPatch linux-2.6-v4l-dvb-experimental.patch ApplyOptionalPatch linux-2.6-v4l-dvb-experimental.patch
ApplyPatch imon-dont-wedge-hardware-after-early-callbacks.patch
# Patches headed upstream # Patches headed upstream
ApplyPatch disable-i8042-check-on-apple-mac.patch ApplyPatch disable-i8042-check-on-apple-mac.patch
@ -2366,6 +2364,9 @@ fi
# ||----w | # ||----w |
# || || # || ||
%changelog %changelog
* Sat Feb 25 2012 Josh Boyer <jwboyer@redhat.com> - 3.3.0-0.rc4.git5.1
- Linux 3.3-rc4-git5 (upstream b52b80023f262ce8a0ffdcb490acb23e8678377a)
* Fri Feb 24 2012 Josh Boyer <jwboyer@redhat.com> * Fri Feb 24 2012 Josh Boyer <jwboyer@redhat.com>
- Linux 3.3-rc4-git4 (upstream bb4c7e9a9908548b458f34afb2fee74dc0d49f90) - Linux 3.3-rc4-git4 (upstream bb4c7e9a9908548b458f34afb2fee74dc0d49f90)

2
sources
View File

@ -1,4 +1,4 @@
364066fa18767ec0ae5f4e4abcf9dc51 linux-3.2.tar.xz 364066fa18767ec0ae5f4e4abcf9dc51 linux-3.2.tar.xz
35f3b51bfd9bd47a939753e68d49ca00 patch-3.3-rc4.xz 35f3b51bfd9bd47a939753e68d49ca00 patch-3.3-rc4.xz
02c210a8fd24acca8c1ac93f6f1d3913 compat-wireless-2012-02-05.tar.bz2 02c210a8fd24acca8c1ac93f6f1d3913 compat-wireless-2012-02-05.tar.bz2
e41cec30d0e61dd975893953eef7d58c patch-3.3-rc4-git4.xz 5f197e6bdcf07ec465bbdd503426d7c1 patch-3.3-rc4-git5.xz

131
utrace.patch
View File

@ -1,4 +1,8 @@
utrace for 3.3-rc1 kernel, on top of dcd6c92267155e70a94b3927bce681ce74b80d1f. From d007ce2c3f1f67624fde5e6b7ccc00566b7df9c3 Mon Sep 17 00:00:00 2001
From: Oleg Nesterov <oleg@redhat.com>
Date: Sat, 25 Feb 2012 07:29:40 -0500
Subject: [PATCH] utrace for 3.3-rc4 kernel, on top of
b52b80023f262ce8a0ffdcb490acb23e8678377a.
The split-out series is available in the git repository at: The split-out series is available in the git repository at:
@ -55,7 +59,7 @@ Signed-off-by: Oleg Nesterov <oleg@redhat.com>
include/linux/sched.h | 25 +- include/linux/sched.h | 25 +-
include/linux/signal.h | 2 + include/linux/signal.h | 2 +
include/linux/tracehook.h | 59 +- include/linux/tracehook.h | 59 +-
include/linux/utrace.h | 773 ++++++++++++ include/linux/utrace.h | 774 ++++++++++++
init/Kconfig | 9 + init/Kconfig | 9 +
kernel/Makefile | 1 + kernel/Makefile | 1 +
kernel/exit.c | 5 + kernel/exit.c | 5 +
@ -63,8 +67,8 @@ Signed-off-by: Oleg Nesterov <oleg@redhat.com>
kernel/ptrace.c | 57 +- kernel/ptrace.c | 57 +-
kernel/sched/core.c | 2 +- kernel/sched/core.c | 2 +-
kernel/signal.c | 97 ++- kernel/signal.c | 97 ++-
kernel/utrace.c | 2462 +++++++++++++++++++++++++++++++++++++ kernel/utrace.c | 2466 +++++++++++++++++++++++++++++++++++++
19 files changed, 4069 insertions(+), 56 deletions(-) 19 files changed, 4074 insertions(+), 56 deletions(-)
create mode 100644 Documentation/DocBook/utrace.tmpl create mode 100644 Documentation/DocBook/utrace.tmpl
create mode 100644 include/linux/utrace.h create mode 100644 include/linux/utrace.h
create mode 100644 kernel/utrace.c create mode 100644 kernel/utrace.c
@ -721,10 +725,10 @@ index 5026738..97687f3 100644
clear_tsk_thread_flag(child, TIF_SYSCALL_EMU); clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
#endif #endif
diff --git a/fs/exec.c b/fs/exec.c diff --git a/fs/exec.c b/fs/exec.c
index aeb135c..36a0cbe 100644 index 92ce83a..87ff31f 100644
--- a/fs/exec.c --- a/fs/exec.c
+++ b/fs/exec.c +++ b/fs/exec.c
@@ -1401,9 +1401,12 @@ int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs) @@ -1402,9 +1402,12 @@ int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs)
*/ */
bprm->recursion_depth = depth; bprm->recursion_depth = depth;
if (retval >= 0) { if (retval >= 0) {
@ -810,7 +814,7 @@ index c2f1f6a..236b920 100644
if (child->ptrace & PT_SEIZED) if (child->ptrace & PT_SEIZED)
diff --git a/include/linux/sched.h b/include/linux/sched.h diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4032ec1..e95c1dc 100644 index 7d379a6..a3c4599 100644
--- a/include/linux/sched.h --- a/include/linux/sched.h
+++ b/include/linux/sched.h +++ b/include/linux/sched.h
@@ -185,16 +185,17 @@ print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) @@ -185,16 +185,17 @@ print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
@ -870,7 +874,7 @@ index 4032ec1..e95c1dc 100644
u32 parent_exec_id; u32 parent_exec_id;
u32 self_exec_id; u32 self_exec_id;
diff --git a/include/linux/signal.h b/include/linux/signal.h diff --git a/include/linux/signal.h b/include/linux/signal.h
index 7987ce7..c320549 100644 index 7987ce74..c320549 100644
--- a/include/linux/signal.h --- a/include/linux/signal.h
+++ b/include/linux/signal.h +++ b/include/linux/signal.h
@@ -239,6 +239,8 @@ static inline int valid_signal(unsigned long sig) @@ -239,6 +239,8 @@ static inline int valid_signal(unsigned long sig)
@ -999,10 +1003,10 @@ index a71a292..a1bac95 100644
diff --git a/include/linux/utrace.h b/include/linux/utrace.h diff --git a/include/linux/utrace.h b/include/linux/utrace.h
new file mode 100644 new file mode 100644
index 0000000..f37373b index 0000000..46959af
--- /dev/null --- /dev/null
+++ b/include/linux/utrace.h +++ b/include/linux/utrace.h
@@ -0,0 +1,773 @@ @@ -0,0 +1,774 @@
+/* +/*
+ * utrace infrastructure interface for debugging user processes + * utrace infrastructure interface for debugging user processes
+ * + *
@ -1322,6 +1326,7 @@ index 0000000..f37373b
+#define UTRACE_ATTACH_MATCH_MASK 0x000f +#define UTRACE_ATTACH_MATCH_MASK 0x000f
+#define UTRACE_ATTACH_CREATE 0x0010 /* Attach a new engine. */ +#define UTRACE_ATTACH_CREATE 0x0010 /* Attach a new engine. */
+#define UTRACE_ATTACH_EXCLUSIVE 0x0020 /* Refuse if existing match. */ +#define UTRACE_ATTACH_EXCLUSIVE 0x0020 /* Refuse if existing match. */
+#define UTRACE_ATTACH_ATOMIC 0x0040 /* For _CREATE, don't sleep */
+ +
+/** +/**
+ * struct utrace_engine - per-engine structure + * struct utrace_engine - per-engine structure
@ -1809,7 +1814,7 @@ index 2d9de86..6c6749d 100644
obj-$(CONFIG_AUDITSYSCALL) += auditsc.o obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o
diff --git a/kernel/exit.c b/kernel/exit.c diff --git a/kernel/exit.c b/kernel/exit.c
index 294b170..16108a5 100644 index 4b4042f..b1e0518 100644
--- a/kernel/exit.c --- a/kernel/exit.c
+++ b/kernel/exit.c +++ b/kernel/exit.c
@@ -169,6 +169,8 @@ void release_task(struct task_struct * p) @@ -169,6 +169,8 @@ void release_task(struct task_struct * p)
@ -1839,18 +1844,18 @@ index 294b170..16108a5 100644
validate_creds_for_do_exit(tsk); validate_creds_for_do_exit(tsk);
diff --git a/kernel/fork.c b/kernel/fork.c diff --git a/kernel/fork.c b/kernel/fork.c
index 051f090..e103101 100644 index e2cd3e2..fa40928 100644
--- a/kernel/fork.c --- a/kernel/fork.c
+++ b/kernel/fork.c +++ b/kernel/fork.c
@@ -66,6 +66,7 @@ @@ -67,6 +67,7 @@
#include <linux/user-return-notifier.h>
#include <linux/oom.h> #include <linux/oom.h>
#include <linux/khugepaged.h> #include <linux/khugepaged.h>
#include <linux/signalfd.h>
+#include <linux/utrace.h> +#include <linux/utrace.h>
#include <asm/pgtable.h> #include <asm/pgtable.h>
#include <asm/pgalloc.h> #include <asm/pgalloc.h>
@@ -169,6 +170,8 @@ void free_task(struct task_struct *tsk) @@ -170,6 +171,8 @@ void free_task(struct task_struct *tsk)
free_thread_info(tsk->stack); free_thread_info(tsk->stack);
rt_mutex_debug_task_free(tsk); rt_mutex_debug_task_free(tsk);
ftrace_graph_exit_task(tsk); ftrace_graph_exit_task(tsk);
@ -1859,7 +1864,7 @@ index 051f090..e103101 100644
free_task_struct(tsk); free_task_struct(tsk);
} }
EXPORT_SYMBOL(free_task); EXPORT_SYMBOL(free_task);
@@ -1092,6 +1095,8 @@ static struct task_struct *copy_process(unsigned long clone_flags, @@ -1115,6 +1118,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
if (!p) if (!p)
goto fork_out; goto fork_out;
@ -1868,7 +1873,7 @@ index 051f090..e103101 100644
ftrace_graph_init_task(p); ftrace_graph_init_task(p);
rt_mutex_init_task(p); rt_mutex_init_task(p);
@@ -1527,6 +1532,8 @@ long do_fork(unsigned long clone_flags, @@ -1550,6 +1555,8 @@ long do_fork(unsigned long clone_flags,
init_completion(&vfork); init_completion(&vfork);
} }
@ -1877,7 +1882,7 @@ index 051f090..e103101 100644
/* /*
* We set PF_STARTING at creation in case tracing wants to * We set PF_STARTING at creation in case tracing wants to
* use this to distinguish a fully live task from one that * use this to distinguish a fully live task from one that
@@ -1538,6 +1545,8 @@ long do_fork(unsigned long clone_flags, @@ -1561,6 +1568,8 @@ long do_fork(unsigned long clone_flags,
wake_up_new_task(p); wake_up_new_task(p);
/* forking complete and child started to run, tell ptracer */ /* forking complete and child started to run, tell ptracer */
@ -2017,10 +2022,10 @@ index 00ab2ca..a7024b8 100644
} }
unlock_task_sighand(child, &flags); unlock_task_sighand(child, &flags);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index df00cb0..24dfee4 100644 index 5255c9d..f1719b8 100644
--- a/kernel/sched/core.c --- a/kernel/sched/core.c
+++ b/kernel/sched/core.c +++ b/kernel/sched/core.c
@@ -1172,7 +1172,7 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state) @@ -1167,7 +1167,7 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state)
* is actually now running somewhere else! * is actually now running somewhere else!
*/ */
while (task_running(rq, p)) { while (task_running(rq, p)) {
@ -2216,10 +2221,10 @@ index c73c428..0508d93 100644
trace_signal_deliver(signr, info, ka); trace_signal_deliver(signr, info, ka);
diff --git a/kernel/utrace.c b/kernel/utrace.c diff --git a/kernel/utrace.c b/kernel/utrace.c
new file mode 100644 new file mode 100644
index 0000000..c817a46 index 0000000..a169e1b
--- /dev/null --- /dev/null
+++ b/kernel/utrace.c +++ b/kernel/utrace.c
@@ -0,0 +1,2462 @@ @@ -0,0 +1,2466 @@
+/* +/*
+ * utrace infrastructure interface for debugging user processes + * utrace infrastructure interface for debugging user processes
+ * + *
@ -2335,9 +2340,9 @@ index 0000000..c817a46
+ * + *
+ * This returns false only in case of a memory allocation failure. + * This returns false only in case of a memory allocation failure.
+ */ + */
+static bool utrace_task_alloc(struct task_struct *task) +static bool utrace_task_alloc(struct task_struct *task, gfp_t gfp_flags)
+{ +{
+ struct utrace *utrace = kmem_cache_zalloc(utrace_cachep, GFP_KERNEL); + struct utrace *utrace = kmem_cache_zalloc(utrace_cachep, gfp_flags);
+ if (unlikely(!utrace)) + if (unlikely(!utrace))
+ return false; + return false;
+ spin_lock_init(&utrace->lock); + spin_lock_init(&utrace->lock);
@ -2517,6 +2522,7 @@ index 0000000..c817a46
+{ +{
+ struct utrace *utrace = task_utrace_struct(target); + struct utrace *utrace = task_utrace_struct(target);
+ struct utrace_engine *engine; + struct utrace_engine *engine;
+ gfp_t gfp_flags;
+ int ret; + int ret;
+ +
+ if (!(flags & UTRACE_ATTACH_CREATE)) { + if (!(flags & UTRACE_ATTACH_CREATE)) {
@ -2539,13 +2545,16 @@ index 0000000..c817a46
+ */ + */
+ return ERR_PTR(-EPERM); + return ERR_PTR(-EPERM);
+ +
+ gfp_flags = (flags & UTRACE_ATTACH_ATOMIC)
+ ? GFP_ATOMIC : GFP_KERNEL;
+
+ if (!utrace) { + if (!utrace) {
+ if (unlikely(!utrace_task_alloc(target))) + if (unlikely(!utrace_task_alloc(target, gfp_flags)))
+ return ERR_PTR(-ENOMEM); + return ERR_PTR(-ENOMEM);
+ utrace = task_utrace_struct(target); + utrace = task_utrace_struct(target);
+ } + }
+ +
+ engine = kmem_cache_alloc(utrace_engine_cachep, GFP_KERNEL); + engine = kmem_cache_alloc(utrace_engine_cachep, gfp_flags);
+ if (unlikely(!engine)) + if (unlikely(!engine))
+ return ERR_PTR(-ENOMEM); + return ERR_PTR(-ENOMEM);
+ +
@ -4682,74 +4691,6 @@ index 0000000..c817a46
+{ +{
+ seq_printf(m, "Utrace:\t%lx\n", p->utrace_flags); + seq_printf(m, "Utrace:\t%lx\n", p->utrace_flags);
+} +}
Add the new UTRACE_ATTACH_ATOMIC flag for utrace_attach_task().
If it is set, UTRACE_ATTACH_CREATE uses GFP_ATOMIC for memory
allocations and thus it can be used in atomic context.
Suggested-by: Mark Wielaard <mjw@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
include/linux/utrace.h | 1 +
kernel/utrace.c | 12 ++++++++----
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/include/linux/utrace.h b/include/linux/utrace.h
index f37373b..46959af 100644
--- a/include/linux/utrace.h
+++ b/include/linux/utrace.h
@@ -317,6 +317,7 @@ static inline enum utrace_syscall_action utrace_syscall_action(u32 action)
#define UTRACE_ATTACH_MATCH_MASK 0x000f
#define UTRACE_ATTACH_CREATE 0x0010 /* Attach a new engine. */
#define UTRACE_ATTACH_EXCLUSIVE 0x0020 /* Refuse if existing match. */
+#define UTRACE_ATTACH_ATOMIC 0x0040 /* For _CREATE, don't sleep */
/**
* struct utrace_engine - per-engine structure
diff --git a/kernel/utrace.c b/kernel/utrace.c
index c817a46..a169e1b 100644
--- a/kernel/utrace.c
+++ b/kernel/utrace.c
@@ -113,9 +113,9 @@ void task_utrace_unlock(struct task_struct *task)
*
* This returns false only in case of a memory allocation failure.
*/
-static bool utrace_task_alloc(struct task_struct *task)
+static bool utrace_task_alloc(struct task_struct *task, gfp_t gfp_flags)
{
- struct utrace *utrace = kmem_cache_zalloc(utrace_cachep, GFP_KERNEL);
+ struct utrace *utrace = kmem_cache_zalloc(utrace_cachep, gfp_flags);
if (unlikely(!utrace))
return false;
spin_lock_init(&utrace->lock);
@@ -295,6 +295,7 @@ struct utrace_engine *utrace_attach_task(
{
struct utrace *utrace = task_utrace_struct(target);
struct utrace_engine *engine;
+ gfp_t gfp_flags;
int ret;
if (!(flags & UTRACE_ATTACH_CREATE)) {
@@ -317,13 +318,16 @@ struct utrace_engine *utrace_attach_task(
*/
return ERR_PTR(-EPERM);
+ gfp_flags = (flags & UTRACE_ATTACH_ATOMIC)
+ ? GFP_ATOMIC : GFP_KERNEL;
+
if (!utrace) {
- if (unlikely(!utrace_task_alloc(target)))
+ if (unlikely(!utrace_task_alloc(target, gfp_flags)))
return ERR_PTR(-ENOMEM);
utrace = task_utrace_struct(target);
}
- engine = kmem_cache_alloc(utrace_engine_cachep, GFP_KERNEL);
+ engine = kmem_cache_alloc(utrace_engine_cachep, gfp_flags);
if (unlikely(!engine))
return ERR_PTR(-ENOMEM);
-- --
1.5.5.1 1.7.9.1