| Message ID | 20210301114749.47914-1-david@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v1] microblaze: tag highmem_setup() with __meminit | expand |
On Mon, Mar 01, 2021 at 12:47:49PM +0100, David Hildenbrand wrote: > With commit a0cd7a7c4bc0 ("mm: simplify free_highmem_page() and > free_reserved_page()") the kernel test robot complains about a warning: > > WARNING: modpost: vmlinux.o(.text.unlikely+0x23ac): Section mismatch in > reference from the function highmem_setup() to the function > .meminit.text:memblock_is_reserved() > > This has been broken ever since microblaze added highmem support, > because memblock_is_reserved() was already tagged with "__init" back then - > most probably the function always got inlined, so we never stumbled over > it. It might be good to point out that we need __meminit instead of __init because microblaze platform does not define CONFIG_ARCH_KEEP_MEMBLOCK, and __init_memblock fallsback to that. (I had to go and look as I was puzzled :-) ) Reviewed-by: Oscar Salvador <osalvador@suse.de> > > Reported-by: kernel test robot <lkp@intel.com> > Fixes: 2f2f371f8907 ("microblaze: Highmem support") > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Michal Simek <monstr@monstr.eu> > Cc: Mike Rapoport <rppt@kernel.org> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Arvind Sankar <nivedita@alum.mit.edu> > Cc: Ira Weiny <ira.weiny@intel.com> > Cc: Randy Dunlap <rdunlap@infradead.org> > Cc: Oscar Salvador <osalvador@suse.de> > Cc: Anshuman Khandual <anshuman.khandual@arm.com> > Signed-off-by: David Hildenbrand <david@redhat.com> > --- > arch/microblaze/mm/init.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c > index 181e48782e6c..05cf1fb3f5ff 100644 > --- a/arch/microblaze/mm/init.c > +++ b/arch/microblaze/mm/init.c > @@ -52,7 +52,7 @@ static void __init highmem_init(void) > pkmap_page_table = virt_to_kpte(PKMAP_BASE); > } > > -static void highmem_setup(void) > +static void __meminit highmem_setup(void) > { > unsigned long pfn; > > -- > 2.29.2 > >
On 01.03.21 23:18, Oscar Salvador wrote: > On Mon, Mar 01, 2021 at 12:47:49PM +0100, David Hildenbrand wrote: >> With commit a0cd7a7c4bc0 ("mm: simplify free_highmem_page() and >> free_reserved_page()") the kernel test robot complains about a warning: >> >> WARNING: modpost: vmlinux.o(.text.unlikely+0x23ac): Section mismatch in >> reference from the function highmem_setup() to the function >> .meminit.text:memblock_is_reserved() >> >> This has been broken ever since microblaze added highmem support, >> because memblock_is_reserved() was already tagged with "__init" back then - >> most probably the function always got inlined, so we never stumbled over >> it. > > It might be good to point out that we need __meminit instead of __init > because microblaze platform does not define CONFIG_ARCH_KEEP_MEMBLOCK, > and __init_memblock fallsback to that. > > (I had to go and look as I was puzzled :-) ) > > Reviewed-by: Oscar Salvador <osalvador@suse.de> Thanks! Whoever feels like picking this up (@Andrew?) can you add "We need __meminit because __init_memblock defaults to that without CONFIG_ARCH_KEEP_MEMBLOCK" and __init_memblock is not used outside memblock code.
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c index 181e48782e6c..05cf1fb3f5ff 100644 --- a/arch/microblaze/mm/init.c +++ b/arch/microblaze/mm/init.c @@ -52,7 +52,7 @@ static void __init highmem_init(void) pkmap_page_table = virt_to_kpte(PKMAP_BASE); } -static void highmem_setup(void) +static void __meminit highmem_setup(void) { unsigned long pfn;
With commit a0cd7a7c4bc0 ("mm: simplify free_highmem_page() and free_reserved_page()") the kernel test robot complains about a warning: WARNING: modpost: vmlinux.o(.text.unlikely+0x23ac): Section mismatch in reference from the function highmem_setup() to the function .meminit.text:memblock_is_reserved() This has been broken ever since microblaze added highmem support, because memblock_is_reserved() was already tagged with "__init" back then - most probably the function always got inlined, so we never stumbled over it. Reported-by: kernel test robot <lkp@intel.com> Fixes: 2f2f371f8907 ("microblaze: Highmem support") Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Mike Rapoport <rppt@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Arvind Sankar <nivedita@alum.mit.edu> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: David Hildenbrand <david@redhat.com> --- arch/microblaze/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)