Eric Lee / smarc-ti-linux-kernel

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Commit fec1418da2939d368d934d787f340dd667edc5b7

Authored by Christian Borntraeger
Committed by Greg Kroah-Hartman
1 parent 02c3106b32

kernel: Fix sparse warning for ACCESS_ONCE 

commit c5b19946eb76c67566aae6a84bf2b10ad59295ea upstream.

Commit 927609d622a3 ("kernel: tighten rules for ACCESS ONCE") results in
sparse warnings like "Using plain integer as NULL pointer" - Let's add a
type cast to the dummy assignment.
To avoid warnings lik "sparse: warning: cast to restricted __hc32" we also
use __force on that cast.

Fixes: 927609d622a3 ("kernel: tighten rules for ACCESS ONCE")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff

include/linux/compiler.h
Diff comments   View file @ fec1418
... ... @@ -461,7 +461,7 @@
461 461 * If possible use READ_ONCE/ASSIGN_ONCE instead.
462 462 */
463 463 #define __ACCESS_ONCE(x) ({ \
464   - __maybe_unused typeof(x) __var = 0; \
  464 + __maybe_unused typeof(x) __var = (__force typeof(x)) 0; \
465 465 (volatile typeof(x) *)&(x); })
466 466 #define ACCESS_ONCE(x) (*__ACCESS_ONCE(x))
467 467