From: Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx>
Date: Mon, 2 Jan 2023 17:14:31 +0100
On Fri, Jun 24, 2022 at 02:13:06PM +0200, Alexander Lobakin wrote:
Move generic non-atomic bitops from the asm-generic header which
gets included only when there are no architecture-specific
alternatives, to a separate independent file to make them always
available.
Almost no actual code changes, only one comment added to
generic_test_bit() saying that it's an atomic operation itself
and thus `volatile` must always stay there with no cast-aways.
Suggested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> # comment
Suggested-by: Marco Elver <elver@xxxxxxxxxx> # reference to kernel-doc
Signed-off-by: Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
---
.../asm-generic/bitops/generic-non-atomic.h | 130 ++++++++++++++++++
include/asm-generic/bitops/non-atomic.h | 110 ++-------------
2 files changed, 138 insertions(+), 102 deletions(-)
create mode 100644 include/asm-generic/bitops/generic-non-atomic.h
Hi,
this patch gives me a headache when trying to run sparse against a module.
Olek please help :D
It was fixed shortly after the build bots turned on on the original
series with [0]. Hovewer, no release tag's been made after the fix.
There's also a short discussion regarding packaging Sparse 0.6.4 for
Debian with that fix cherry-picked[1], not sure if it led anywhere.
$ sudo make C=2 -C . M=drivers/net/ethernet/intel/ice/
make: Entering directory '/home/mfijalko/bpf-next'
CHECK drivers/net/ethernet/intel/ice/ice_main.c
drivers/net/ethernet/intel/ice/ice_main.c: note: in included file (through include/linux/bitops.h, include/linux/kernel.h, drivers/net/ethernet/intel/ice/ice.h):
./arch/x86/include/asm/bitops.h:66:1: warning: unreplaced symbol 'return'
[...]
drivers/net/ethernet/intel/ice/ice_main.c: note: in included file (through arch/x86/include/asm/bitops.h, include/linux/bitops.h, include/linux/kernel.h, drivers/net/ethernet/intel/ice/ice.h):
./include/asm-generic/bitops/instrumented-non-atomic.h:142:9: warning: unreplaced symbol 'return'
./include/asm-generic/bitops/instrumented-non-atomic.h:139:1: warning: unreplaced symbol 'return'
that's for a single file, there's no point in including same output for
every other file being checked.
Thanks,
Maciej
[0] https://git.kernel.org/pub/scm/devel/sparse/sparse.git/commit/?id=0e1aae55e49cad7ea43848af5b58ff0f57e7af99
[1] https://lore.kernel.org/all/Yr7kPM1wLZnOqxOA@xxxxxxxxxxxxxxxxxx
Thanks,
Olek
