| Message ID | 20221127-snd-freeze-v7-1-127c582f1ca4@chromium.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | ASoC: SOF: Fix deadlock when shutdown a frozen userspace | expand |
Hi Ricardo,
I love your patch! Yet something to improve:
[auto build test ERROR on 4312098baf37ee17a8350725e6e0d0e8590252d4]
url: https://github.com/intel-lab-lkp/linux/commits/Ricardo-Ribalda/ASoC-SOF-Fix-deadlock-when-shutdown-a-frozen-userspace/20221201-003214
base: 4312098baf37ee17a8350725e6e0d0e8590252d4
patch link: https://lore.kernel.org/r/20221127-snd-freeze-v7-1-127c582f1ca4%40chromium.org
patch subject: [PATCH v7 1/2] kexec: Introduce kexec_with_frozen_processes
config: ia64-randconfig-r022-20221128
compiler: ia64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/ddb7195380bb431ff9f4505d5fcfbef756b80a3a
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Ricardo-Ribalda/ASoC-SOF-Fix-deadlock-when-shutdown-a-frozen-userspace/20221201-003214
git checkout ddb7195380bb431ff9f4505d5fcfbef756b80a3a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
kernel/kexec_core.c: In function 'kexec_with_frozen_processes':
>> kernel/kexec_core.c:59:37: error: 'pm_freezing' undeclared (first use in this function); did you mean 'freezing'?
59 | return kexec_in_progress && pm_freezing;
| ^~~~~~~~~~~
| freezing
kernel/kexec_core.c:59:37: note: each undeclared identifier is reported only once for each function it appears in
kernel/kexec_core.c:60:1: error: control reaches end of non-void function [-Werror=return-type]
60 | }
| ^
cc1: some warnings being treated as errors
vim +59 kernel/kexec_core.c
56
57 bool kexec_with_frozen_processes(void)
58 {
> 59 return kexec_in_progress && pm_freezing;
60 }
61 EXPORT_SYMBOL(kexec_with_frozen_processes);
62
Hi Ricardo,
I love your patch! Yet something to improve:
[auto build test ERROR on 4312098baf37ee17a8350725e6e0d0e8590252d4]
url: https://github.com/intel-lab-lkp/linux/commits/Ricardo-Ribalda/ASoC-SOF-Fix-deadlock-when-shutdown-a-frozen-userspace/20221201-003214
base: 4312098baf37ee17a8350725e6e0d0e8590252d4
patch link: https://lore.kernel.org/r/20221127-snd-freeze-v7-1-127c582f1ca4%40chromium.org
patch subject: [PATCH v7 1/2] kexec: Introduce kexec_with_frozen_processes
config: s390-randconfig-r024-20221128
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 6e4cea55f0d1104408b26ac574566a0e4de48036)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/ddb7195380bb431ff9f4505d5fcfbef756b80a3a
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Ricardo-Ribalda/ASoC-SOF-Fix-deadlock-when-shutdown-a-frozen-userspace/20221201-003214
git checkout ddb7195380bb431ff9f4505d5fcfbef756b80a3a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
All error/warnings (new ones prefixed by >>):
In file included from kernel/kexec_core.c:14:
In file included from include/linux/kexec.h:19:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from kernel/kexec_core.c:14:
In file included from include/linux/kexec.h:19:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from kernel/kexec_core.c:14:
In file included from include/linux/kexec.h:19:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> kernel/kexec_core.c:59:30: error: use of undeclared identifier 'pm_freezing'; did you mean 'freezing'?
return kexec_in_progress && pm_freezing;
^~~~~~~~~~~
freezing
include/linux/freezer.h:75:20: note: 'freezing' declared here
static inline bool freezing(struct task_struct *p) { return false; }
^
>> kernel/kexec_core.c:59:30: warning: address of function 'freezing' will always evaluate to 'true' [-Wpointer-bool-conversion]
return kexec_in_progress && pm_freezing;
~~ ^~~~~~~~~~~
kernel/kexec_core.c:59:30: note: prefix with the address-of operator to silence this warning
return kexec_in_progress && pm_freezing;
^
&
13 warnings and 1 error generated.
vim +59 kernel/kexec_core.c
56
57 bool kexec_with_frozen_processes(void)
58 {
> 59 return kexec_in_progress && pm_freezing;
60 }
61 EXPORT_SYMBOL(kexec_with_frozen_processes);
62
diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 41a686996aaa..c22711e0f7b5 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -426,6 +426,8 @@ extern int kexec_load_disabled; /* flag to track if kexec reboot is in progress */ extern bool kexec_in_progress; +bool kexec_with_frozen_processes(void); + int crash_shrink_memory(unsigned long new_size); ssize_t crash_get_memory_size(void); @@ -507,6 +509,7 @@ static inline void __crash_kexec(struct pt_regs *regs) { } static inline void crash_kexec(struct pt_regs *regs) { } static inline int kexec_should_crash(struct task_struct *p) { return 0; } static inline int kexec_crash_loaded(void) { return 0; } +static inline bool kexec_with_frozen_processes(void) { return false; } #define kexec_in_progress false #endif /* CONFIG_KEXEC_CORE */ diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index ca2743f9c634..8bc8257ee7ca 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -54,6 +54,11 @@ note_buf_t __percpu *crash_notes; /* Flag to indicate we are going to kexec a new kernel */ bool kexec_in_progress = false; +bool kexec_with_frozen_processes(void) +{ + return kexec_in_progress && pm_freezing; +} +EXPORT_SYMBOL(kexec_with_frozen_processes); /* Location of the reserved area for the crash kernel */ struct resource crashk_res = {
Drivers running .shutdown() might want to wait for userspace to complete before exiting. If userspace is frozen and we are running kexec they will stall the computer. Add a way for them to figure out if they should just skip waiting for userspace. Cc: stable@vger.kernel.org Fixes: 83bfc7e793b5 ("ASoC: SOF: core: unregister clients and machine drivers in .shutdown") Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> --- include/linux/kexec.h | 3 +++ kernel/kexec_core.c | 5 +++++ 2 files changed, 8 insertions(+)