Messages in this thread | | | Date | Sun, 23 Sep 2007 11:14:30 +0800 | From | WANG Cong <> | Subject | Re: linux 2.6.23-rc7 - 14 compile warnings |
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On Sat, Sep 22, 2007 at 10:23:59PM -0400, Gerhard Mack wrote: >On Sat, 22 Sep 2007, WANG Cong wrote: > >> >Summary: >> > CC mm/slub.o >> >mm/slub.c: In function 'kfree': >> >mm/slub.c:2491: warning: passing argument 3 of 'slab_free' discards >> >qualifiers from pointer target type > >static void __slab_free(struct kmem_cache *s, struct page *page, > void *x, void *addr) >but .. > >void kfree(const void *x) > >void is not the same as const void. > >> > CC fs/autofs4/symlink.o >> >fs/autofs4/symlink.c: In function 'autofs4_follow_link': >> >fs/autofs4/symlink.c:18: warning: passing argument 2 of 'nd_set_link' >> >discards qualifiers from pointer target type > >Once again ino->u.symlink is a const char and it's dropping the const. >
slab_free(s, page, (void *)x, __builtin_return_address(0)); ^^^^^^^^^ I knew these things. But the explicit casts, such as the above one, mean that we are intended to discard to qualifiers and I think gcc shouldn't warn about this.
Regards.
WANG Cong
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