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    Kbuild: disable 'maybe-uninitialized' warning for CONFIG_PROFILE_ALL_BRANCHES · 815eb71e
    Arnd Bergmann 提交于
    CONFIG_PROFILE_ALL_BRANCHES confuses gcc-5.x to the degree that it prints
    incorrect warnings about a lot of variables that it thinks can be used
    uninitialized, e.g.:
    
    i2c/busses/i2c-diolan-u2c.c: In function 'diolan_usb_xfer':
    i2c/busses/i2c-diolan-u2c.c:391:16: warning: 'byte' may be used uninitialized in this function
    iio/gyro/itg3200_core.c: In function 'itg3200_probe':
    iio/gyro/itg3200_core.c:213:6: warning: 'val' may be used uninitialized in this function
    leds/leds-lp55xx-common.c: In function 'lp55xx_update_bits':
    leds/leds-lp55xx-common.c:350:6: warning: 'tmp' may be used uninitialized in this function
    misc/bmp085.c: In function 'show_pressure':
    misc/bmp085.c:363:10: warning: 'pressure' may be used uninitialized in this function
    power/ds2782_battery.c: In function 'ds2786_get_capacity':
    power/ds2782_battery.c:214:17: warning: 'raw' may be used uninitialized in this function
    
    These are all false positives that either rob someone's time when trying
    to figure out whether they are real, or they get people to send wrong
    patches to shut up the warnings.
    
    Nobody normally wants to run a CONFIG_PROFILE_ALL_BRANCHES kernel in
    production, so disabling the whole class of warnings for this configuration
    has no serious downsides either.
    Signed-off-by: NArnd Bergmann <arnd@arndb.de>
    Acked-by: Steven Rostedt <rostedtgoodmis.org>
    Signed-off-by: NMichal Marek <mmarek@suse.com>
    815eb71e
Makefile 55.9 KB