On Tue, Apr 18, 2017 at 04:19:00PM -0500, Tom Lendacky wrote: > The efi_mem_type() function currently returns a 0, which maps to > EFI_RESERVED_TYPE, if the function is unable to find a memmap entry for > the supplied physical address. Returning EFI_RESERVED_TYPE implies that > a memmap entry exists, when it doesn't. Instead of returning 0, change > the function to return a negative error value when no memmap entry is > found. > > Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx> > --- ... > diff --git a/include/linux/efi.h b/include/linux/efi.h > index cd768a1..a27bb3f 100644 > --- a/include/linux/efi.h > +++ b/include/linux/efi.h > @@ -973,7 +973,7 @@ static inline void efi_esrt_init(void) { } > extern int efi_config_parse_tables(void *config_tables, int count, int sz, > efi_config_table_type_t *arch_tables); > extern u64 efi_get_iobase (void); > -extern u32 efi_mem_type (unsigned long phys_addr); > +extern int efi_mem_type (unsigned long phys_addr); WARNING: space prohibited between function name and open parenthesis '(' #101: FILE: include/linux/efi.h:976: +extern int efi_mem_type (unsigned long phys_addr); Please integrate scripts/checkpatch.pl in your patch creation workflow. Some of the warnings/errors *actually* make sense. I know, the other function prototypes have a space too but that's not our coding style. Looks like this trickled in from ia64, from looking at arch/ia64/kernel/efi.c. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.