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staging: kernel.h: Prevent macro expantion bug in container_of_safe() 

There aren't many users of this so it doesn't cause a problem, but we
obviously want to use "__mptr" here instead of "ptr" to prevent the
parameter from being executed twice.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2018-04-26 08:58:27 +03:00 committed by Greg Kroah-Hartman
parent 2bbdd81567
commit 227abcc6da
1 changed files with 1 additions and 1 deletions
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2
include/linux/kernel.h
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@ -977,7 +977,7 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
!__same_type(*(ptr), void), \
"pointer type mismatch in container_of()"); \
IS_ERR_OR_NULL(ptr) ? ERR_CAST(ptr) : \
IS_ERR_OR_NULL(__mptr) ? ERR_CAST(__mptr) : \
((type *)(__mptr - offsetof(type, member))); })
/* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */