Currently, the bitops test consists of two parts: one part is executed
during module load, the second part during module unload. This is
cumbersome for the user, as he has to perform two steps to execute all
tests, and is different from most (all?) other tests.
Merge the two parts, so both are executed during module load.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Cc: Wei Yang <[email protected]>
Cc: Jesse Brandeburg <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>
Test some bit clears/sets to make sure assembly doesn't change, and that
the set_bit and clear_bit functions work and don't cause sparse warnings.
Instruct Kbuild to build this file with extra warning level -Wextra, to
catch new issues, and also doesn't hurt to build with C=1.
This was used to test changes to arch/x86/include/asm/bitops.h.
In particular, sparse (C=1) was very concerned when the last bit before a
natural boundary, like 7, or 31, was being tested, as this causes sign
extension (0xffffff7f) for instance when clearing bit 7.
Recommended usage:
make defconfig
scripts/config -m CONFIG_TEST_BITOPS
make modules_prepare
make C=1 W=1 lib/test_bitops.ko
objdump -S -d lib/test_bitops.ko
insmod lib/test_bitops.ko
rmmod lib/test_bitops.ko
<check dmesg>, there should be no compiler/sparse warnings and no
error messages in log.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Jesse Brandeburg <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Cc: Thomas Gleixner <[email protected]>
CcL Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Rasmus Villemoes <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Wei Yang <[email protected]>
Cc: Christian Brauner <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Zhen Lei