tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2016.05.17a head: ac3c30e8911d244986e3bb2c56f7d3ca84405d98 commit: 31862f2d44ddc7144a12656cf2a9ec60c5d200df [42/45] rcu: Make call_rcu_tasks() tolerate first call with irqs disabled config: um-allmodconfig (attached as .config) compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430 reproduce: git checkout 31862f2d44ddc7144a12656cf2a9ec60c5d200df # save the attached .config to linux build tree make ARCH=um
Note: the rcu/dev.2016.05.17a HEAD ac3c30e8911d244986e3bb2c56f7d3ca84405d98
builds fine.
It only hurts bisectibility.
All errors (new ones prefixed by >>):
kernel/rcu/update.c:828:13: sparse: incorrect type in argument 1 (different
modifiers)
kernel/rcu/update.c:828:13: expected int ( *threadfn )( ... )
kernel/rcu/update.c:828:13: got int ( static [toplevel] [noreturn]
*<noident> )( ... )
kernel/rcu/update.c:572:28: sparse: undefined identifier
'arch_irqs_disabled_flags'
In file included from include/linux/spinlock.h:53:0,
from kernel/rcu/update.c:36:
kernel/rcu/update.c: In function 'call_rcu_tasks':
>> include/linux/irqflags.h:79:3: error: implicit declaration of function
>> 'arch_irqs_disabled_flags' [-Werror=implicit-function-declaration]
arch_irqs_disabled_flags(flags); \
^
include/linux/irqflags.h:149:36: note: in expansion of macro
'raw_irqs_disabled_flags'
#define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
^~~~~~~~~~~~~~~~~~~~~~~
kernel/rcu/update.c:572:21: note: in expansion of macro 'irqs_disabled_flags'
(!havetask && !irqs_disabled_flags(flags))) {
^~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/arch_irqs_disabled_flags +79 include/linux/irqflags.h
df9ee292 David Howells 2010-10-07 73 typecheck(unsigned long,
flags); \
df9ee292 David Howells 2010-10-07 74 flags =
arch_local_save_flags(); \
df9ee292 David Howells 2010-10-07 75 } while (0)
df9ee292 David Howells 2010-10-07 76 #define raw_irqs_disabled_flags(flags)
\
df9ee292 David Howells 2010-10-07 77 ({
\
df9ee292 David Howells 2010-10-07 78 typecheck(unsigned long,
flags); \
df9ee292 David Howells 2010-10-07 @79
arch_irqs_disabled_flags(flags); \
df9ee292 David Howells 2010-10-07 80 })
df9ee292 David Howells 2010-10-07 81 #define raw_irqs_disabled()
(arch_irqs_disabled())
df9ee292 David Howells 2010-10-07 82 #define raw_safe_halt()
arch_safe_halt()
:::::: The code at line 79 was first introduced by commit
:::::: df9ee29270c11dba7d0fe0b83ce47a4d8e8d2101 Fix IRQ flag handling naming
:::::: TO: David Howells <dhowe...@redhat.com>
:::::: CC: David Howells <dhowe...@redhat.com>
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