Messages in this thread Patch in this message | | | From | Tom Rini <> | Subject | [PATCH v2] numa: Mark __node_set as __always_inline | Date | Thu, 25 Jul 2013 14:26:10 -0400 |
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It is posible for some compilers to decide that __node_set does not need to be made turned into an inline function. When the compiler does this on an __init function calling it on __initdata we get a section mismatch warning now. Use __always_inline to ensure that we will be inlined.
Reported-by: Paul Bolle <pebolle@tiscali.nl> Cc: Jianpeng Ma <majianpeng@gmail.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Wen Congyang <wency@cn.fujitsu.com> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Mel Gorman <mgorman@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Tom Rini <trini@ti.com>
--- Changes in v2: - As per KOSAKI Motohiro, add a comment as well about why we need __always_inline to the header. --- include/linux/nodemask.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h index 4e2cbfa..58b9a02 100644 --- a/include/linux/nodemask.h +++ b/include/linux/nodemask.h @@ -98,8 +98,17 @@ typedef struct { DECLARE_BITMAP(bits, MAX_NUMNODES); } nodemask_t; extern nodemask_t _unused_nodemask_arg_; +/* + * The inline keyword gives the compiler room to decide to inline, or + * not inline a function as it sees best. However, as these functions + * are called in both __init and non-__init functions, if they are not + * inlined we will end up with a section mis-match error (of the type of + * freeable items not being freed). So we must use __always_inline here + * to fix the problem. If other functions in the future also end up in + * this situation they will also need to be annotated as __always_inline + */ #define node_set(node, dst) __node_set((node), &(dst)) -static inline void __node_set(int node, volatile nodemask_t *dstp) +static __always_inline void __node_set(int node, volatile nodemask_t *dstp) { set_bit(node, dstp->bits); } -- 1.7.9.5
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