Re: [PATCH v5 11/14] ARC: Update syscall-names.list for ARC specific syscalls
* Vineet Gupta via Libc-alpha: > On 4/17/20 4:05 PM, Joseph Myers wrote: >> This patch is OK. > > So when the rest of port is ready, this will be part of main commit ? I think this can go in today. ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
Re: [PATCH v3] Make any 32-bit time based syscalls unavailable for TIMESIZE==64
* Vineet Gupta via Libc-alpha: > On 4/13/20 2:12 PM, Vineet Gupta via Libc-alpha wrote: >> On 4/6/20 11:54 AM, Vineet Gupta wrote: >>> On 3/31/20 2:47 PM, Vineet Gupta via Libc-alpha wrote: From: Vineet Gupta via Libc-alpha An older asm-generic syscall ABI may have kernel provide 32-bit time syscalls, so undef them to not mix 32/64 in 64-bit time regime. Signed-off-by: Vineet Gupta >>> >>> ping ! >> >> ping ^2 ! > > If this is not suitable for common code, I'd still like to add this > as part of ARC port to safe guard against future snafus. Have you tried to add the #undefs to fixup-asm-unistd.h? See sysdeps/unix/sysv/linux/arm/fixup-asm-unistd.h for an example. I have not tried if #undefs work there, but they should. If not, we can fix that. ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
[PATCHv3 00/50] Add log level to show_stack()
Changes to v3:
- Collected more architectual Acks and Reviewed-by
- Fixed compilation on sparc64
Changes to v2:
- Removed excessive pr_cont("\n") (nits by Senozhatsky)
- Leave backtrace debugging messages with pr_debug()
(noted by Russell King and Will Deacon)
- Correct microblaze_unwind_inner() declaration
(Thanks to Michal Simek and kbuild test robot)
- Fix copy'n'paste typo in show_stack_loglvl() for sparc
(kbuild robot)
- Fix backtrace output on xtensa
(Thanks Max Filippov)
- Add loglevel to show_stack() on s390 (kbuild robot)
- Collected all Reviewed-by and Acked-by (thanks!)
v2: https://lore.kernel.org/linux-riscv/20200316143916.195608-1-d...@arista.com/
v1: https://lore.kernel.org/linux-riscv/20191106030542.868541-1-d...@arista.com/
Add log level argument to show_stack().
Done in three stages:
1. Introducing show_stack_loglvl() for every architecture
2. Migrating old users with an explicit log level
3. Renaming show_stack_loglvl() into show_stack()
Justification:
o It's a design mistake to move a business-logic decision
into platform realization detail.
o I have currently two patches sets that would benefit from this work:
Removing console_loglevel jumps in sysrq driver [1]
Hung task warning before panic [2] - suggested by Tetsuo (but he
probably didn't realise what it would involve).
o While doing (1), (2) the backtraces were adjusted to headers
and other messages for each situation - so there won't be a situation
when the backtrace is printed, but the headers are missing because
they have lesser log level (or the reverse).
o As the result in (2) plays with console_loglevel for kdb are removed.
The least important for upstream, but maybe still worth to note that
every company I've worked in so far had an off-list patch to print
backtrace with the needed log level (but only for the architecture they
cared about).
If you have other ideas how you will benefit from show_stack() with
a log level - please, reply to this cover letter.
See also discussion on v1:
https://lore.kernel.org/linux-riscv/20191106083538.z5nlpuf64cigx...@pathway.suse.cz/
Cc: Andrew Morton
Cc: Greg Kroah-Hartman
Cc: Ingo Molnar
Cc: Jiri Slaby
Cc: Petr Mladek
Cc: Sergey Senozhatsky
Cc: Steven Rostedt
Cc: Tetsuo Handa
Thanks,
Dmitry
[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-d...@arista.com/T/#u
[2]:
https://lkml.kernel.org/r/41fd7652-df1f-26f6-aba0-b87ebae07...@i-love.sakura.ne.jp
Dmitry Safonov (50):
kallsyms/printk: Add loglvl to print_ip_sym()
alpha: Add show_stack_loglvl()
arc: Add show_stack_loglvl()
arm/asm: Add loglvl to c_backtrace()
arm: Add loglvl to unwind_backtrace()
arm: Add loglvl to dump_backtrace()
arm: Wire up dump_backtrace_{entry,stm}
arm: Add show_stack_loglvl()
arm64: Add loglvl to dump_backtrace()
arm64: Add show_stack_loglvl()
c6x: Add show_stack_loglvl()
csky: Add show_stack_loglvl()
h8300: Add show_stack_loglvl()
hexagon: Add show_stack_loglvl()
ia64: Pass log level as arg into ia64_do_show_stack()
ia64: Add show_stack_loglvl()
m68k: Add show_stack_loglvl()
microblaze: Add loglvl to microblaze_unwind_inner()
microblaze: Add loglvl to microblaze_unwind()
microblaze: Add show_stack_loglvl()
mips: Add show_stack_loglvl()
nds32: Add show_stack_loglvl()
nios2: Add show_stack_loglvl()
openrisc: Add show_stack_loglvl()
parisc: Add show_stack_loglvl()
powerpc: Add show_stack_loglvl()
riscv: Add show_stack_loglvl()
s390: Add show_stack_loglvl()
sh: Add loglvl to dump_mem()
sh: Remove needless printk()
sh: Add loglvl to printk_address()
sh: Add loglvl to show_trace()
sh: Add show_stack_loglvl()
sparc: Add show_stack_loglvl()
um/sysrq: Remove needless variable sp
um: Add show_stack_loglvl()
unicore32: Remove unused pmode argument in c_backtrace()
unicore32: Add loglvl to c_backtrace()
unicore32: Add show_stack_loglvl()
x86: Add missing const qualifiers for log_lvl
x86: Add show_stack_loglvl()
xtensa: Add loglvl to show_trace()
xtensa: Add show_stack_loglvl()
sysrq: Use show_stack_loglvl()
x86/amd_gart: Print stacktrace for a leak with KERN_ERR
power: Use show_stack_loglvl()
kdb: Don't play with console_loglevel
sched: Print stack trace with KERN_INFO
kernel: Use show_stack_loglvl()
kernel: Rename show_stack_loglvl() => show_stack()
arch/alpha/kernel/traps.c| 22 +++
arch/arc/include/asm/bug.h | 3 ++-
arch/arc/kernel/stacktrace.c | 17 +++-
arch/arc/kernel/troubleshoot.c | 2 +-
arch/arm/include/asm/bug.h | 3 ++-
arch/arm/include/asm/traps.h | 3 ++-
arch/arm/include/asm/unwind.h| 3 ++-
arch/arm/kernel/traps.c | 39 +++
arch/arm/kernel/unwind.c | 5 ++--
arch/arm/lib/backtrace-clang.S | 9 +--
arch/arm/lib/backtrace.S | 14 +++---
arch/arm64/include/asm/stacktrace.h | 3 ++-
arch/arm64/kernel/process.c
[PATCHv3 03/50] arc: Add show_stack_loglvl()
Currently, the log-level of show_stack() depends on a platform
realization. It creates situations where the headers are printed with
lower log level or higher than the stacktrace (depending on
a platform or user).
Furthermore, it forces the logic decision from user to an architecture
side. In result, some users as sysrq/kdb/etc are doing tricks with
temporary rising console_loglevel while printing their messages.
And in result it not only may print unwanted messages from other CPUs,
but also omit printing at all in the unlucky case where the printk()
was deferred.
Introducing log-level parameter and KERN_UNSUPPRESSED [1] seems
an easier approach than introducing more printk buffers.
Also, it will consolidate printings with headers.
Introduce show_stack_loglvl(), that eventually will substitute
show_stack().
As a good side-effect header "Stack Trace:" is now printed with the same
log level as the rest of backtrace.
Cc: Vineet Gupta
Cc: linux-snps-arc@lists.infradead.org
[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-d...@arista.com/T/#u
Signed-off-by: Dmitry Safonov
---
arch/arc/include/asm/bug.h | 3 ++-
arch/arc/kernel/stacktrace.c | 21 +++--
arch/arc/kernel/troubleshoot.c | 2 +-
3 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/arch/arc/include/asm/bug.h b/arch/arc/include/asm/bug.h
index 0be19fd1a412..4c453ba96c51 100644
--- a/arch/arc/include/asm/bug.h
+++ b/arch/arc/include/asm/bug.h
@@ -13,7 +13,8 @@
struct task_struct;
void show_regs(struct pt_regs *regs);
-void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs);
+void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs,
+const char *loglvl);
void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
unsigned long address);
void die(const char *str, struct pt_regs *regs, unsigned long address);
diff --git a/arch/arc/kernel/stacktrace.c b/arch/arc/kernel/stacktrace.c
index 1e440bbfa876..24f9cd8a12c9 100644
--- a/arch/arc/kernel/stacktrace.c
+++ b/arch/arc/kernel/stacktrace.c
@@ -158,9 +158,11 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs
*regs,
/* Call-back which plugs into unwinding core to dump the stack in
* case of panic/OOPs/BUG etc
*/
-static int __print_sym(unsigned int address, void *unused)
+static int __print_sym(unsigned int address, void *arg)
{
- printk(" %pS\n", (void *)address);
+ const char *loglvl = arg;
+
+ printk("%s %pS\n", loglvl, (void *)address);
return 0;
}
@@ -217,17 +219,24 @@ static int __get_first_nonsched(unsigned int address,
void *unused)
*-
*/
-noinline void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs)
+noinline void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs,
+ const char *loglvl)
{
- pr_info("\nStack Trace:\n");
- arc_unwind_core(tsk, regs, __print_sym, NULL);
+ printk("%s\nStack Trace:\n", loglvl);
+ arc_unwind_core(tsk, regs, __print_sym, (void *)loglvl);
}
EXPORT_SYMBOL(show_stacktrace);
/* Expected by sched Code */
+void show_stack_loglvl(struct task_struct *tsk, unsigned long *sp,
+ const char *loglvl)
+{
+ show_stacktrace(tsk, NULL, loglvl);
+}
+
void show_stack(struct task_struct *tsk, unsigned long *sp)
{
- show_stacktrace(tsk, NULL);
+ show_stack_loglvl(tsk, sp, KERN_DEFAULT);
}
/* Another API expected by schedular, shows up in "ps" as Wait Channel
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c
index d2999503fb8a..660681101523 100644
--- a/arch/arc/kernel/troubleshoot.c
+++ b/arch/arc/kernel/troubleshoot.c
@@ -242,5 +242,5 @@ void show_kernel_fault_diag(const char *str, struct pt_regs
*regs,
/* Show stack trace if this Fatality happened in kernel mode */
if (!user_mode(regs))
- show_stacktrace(current, regs);
+ show_stacktrace(current, regs, KERN_DEFAULT);
}
--
2.26.0
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