• David Howells's avatar
    NOMMU: percpu should use is_vmalloc_addr(). · eac522ef
    David Howells authored
    per_cpu_ptr_to_phys() uses VMALLOC_START and VMALLOC_END to determine if an
    address is in the vmalloc() region or not.  This is incorrect on NOMMU as
    there is no real vmalloc() capability (vmalloc() is emulated by kmalloc()).
    
    The correct way to do this is to use is_vmalloc_addr().  This encapsulates the
    vmalloc() region test in MMU mode and just returns 0 in NOMMU mode.
    
    On FRV in NOMMU mode, the percpu compilation fails without this patch:
    
    mm/percpu.c: In function 'per_cpu_ptr_to_phys':
    mm/percpu.c:1011: error: 'VMALLOC_START' undeclared (first use in this function)
    mm/percpu.c:1011: error: (Each undeclared identifier is reported only once
    mm/percpu.c:1011: error: for each function it appears in.)
    mm/percpu.c:1012: error: 'VMALLOC_END' undeclared (first use in this function)
    mm/percpu.c:1018: warning: control reaches end of non-void function
    Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    eac522ef
percpu.c 55.4 KB