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Message-ID: <8bd0f97a1001072054y798833dftdb1b2a744ad52969@mail.gmail.com> Date: Thu, 7 Jan 2010 23:54:18 -0500 From: Mike Frysinger <vapier.adi@...il.com> To: Li Yi <yi.li@...log.com>, Arnd Bergmann <arnd@...db.de> Cc: rostedt@...dmis.org, linux-kernel@...r.kernel.org, uclinux-dist-devel@...ckfin.uclinux.org Subject: Re: [PATCH] Ftrace: irqsoff tracer may cause stack overflow On Thu, Jan 7, 2010 at 23:45, Li Yi wrote: > "irqsoff" tracer may cause stack overflow on architectures using > asm-generic/atomic.h, due to recursive invoking of, e.g. > trace_hardirqs_off(). > > trace_hardirqs_off() -> start_critical_timing() -> atomic_inc() -> > atomic_add_return() -> local_irq_save() -> trace_hardirqs_off() > > Signed-off-by: Yi Li <yi.li@...log.com> > --- > include/asm-generic/atomic.h | 12 ++++++------ Arnd is watching over asm-generic/ atm > @@ -60,11 +60,11 @@ static inline int atomic_add_return(int i, atomic_t > *v) > @@ -82,11 +82,11 @@ static inline int atomic_sub_return(int i, atomic_t > *v) > @@ -139,9 +139,9 @@ static inline void atomic_clear_mask(unsigned long > mask, unsigned long *addr) looks like your mailer has line wrapping problems ... might want to fix that. maybe just find a smtp server in ADI shanghai's office to send to and use sendemail.smtpersver in your ~/.gitconfig ? -mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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