• Daniel Jordan's avatar
    sparc64: Use LOCKDEP_SMALL, not PROVE_LOCKING_SMALL · 395102db
    Daniel Jordan authored
    CONFIG_PROVE_LOCKING_SMALL shrinks the memory usage of lockdep so the
    kernel text, data, and bss fit in the required 32MB limit, but this
    option is not set for every config that enables lockdep.
    
    A 4.10 kernel fails to boot with the console output
    
        Kernel: Using 8 locked TLB entries for main kernel image.
        hypervisor_tlb_lock[2000000:0:8000000071c007c3:1]: errors with f
        Program terminated
    
    with these config options
    
        CONFIG_LOCKDEP=y
        CONFIG_LOCK_STAT=y
        CONFIG_PROVE_LOCKING=n
    
    To fix, rename CONFIG_PROVE_LOCKING_SMALL to CONFIG_LOCKDEP_SMALL, and
    enable this option with CONFIG_LOCKDEP=y so we get the reduced memory
    usage every time lockdep is turned on.
    
    Tested that CONFIG_LOCKDEP_SMALL is set to 'y' if and only if
    CONFIG_LOCKDEP is set to 'y'.  When other lockdep-related config options
    that select CONFIG_LOCKDEP are enabled (e.g. CONFIG_LOCK_STAT or
    CONFIG_PROVE_LOCKING), verified that CONFIG_LOCKDEP_SMALL is also
    enabled.
    
    Fixes: e6b5f1be ("config: Adding the new config parameter CONFIG_PROVE_LOCKING_SMALL for sparc")
    Signed-off-by: default avatarDaniel Jordan <daniel.m.jordan@oracle.com>
    Reviewed-by: default avatarBabu Moger <babu.moger@oracle.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    395102db
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