• Sudip Mukherjee's avatar
    blackfin: define dummy pgprot_writecombine for !MMU · e928f350
    Sudip Mukherjee authored
    blackfin allmodconfig build fails with the error:
    
      ../sound/core/pcm_native.c: In function 'snd_pcm_lib_default_mmap':
      ../sound/core/pcm_native.c:3386:24: error: implicit declaration of function 'pgprot_writecombine' [-Werror=implicit-function-declaration]
         area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
                              ^
      ../sound/core/pcm_native.c:3386:22: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int'
         area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
                            ^
    
    When !MMU, asm-generic will not define default pgprot_writecombine, so
    blackfin needs to define it by itself.
    
    The patch idea is from commit 65b9ab88 ("arch/c6x/include/asm/pgtable.h:
    define dummy pgprot_writecombine for !MMU")
    Signed-off-by: default avatarSudip Mukherjee <sudip@vectorindia.org>
    Cc: Steven Miao <realmz6@gmail.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    e928f350
pgtable.h 3 KB