Commit bcbf0d56 authored by Alexander Potapenko's avatar Alexander Potapenko Committed by Linus Torvalds

kasan: remove the unnecessary WARN_ONCE from quarantine.c

It's quite unlikely that the user will so little memory that the per-CPU
quarantines won't fit into the given fraction of the available memory.
Even in that case he won't be able to do anything with the information
given in the warning.

Link: http://lkml.kernel.org/r/1470929182-101413-1-git-send-email-glider@google.comSigned-off-by: default avatarAlexander Potapenko <glider@google.com>
Acked-by: default avatarAndrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kuthonuzo Luruo <kuthonuzo.luruo@hpe.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 615d66c3
...@@ -217,11 +217,8 @@ void quarantine_reduce(void) ...@@ -217,11 +217,8 @@ void quarantine_reduce(void)
new_quarantine_size = (READ_ONCE(totalram_pages) << PAGE_SHIFT) / new_quarantine_size = (READ_ONCE(totalram_pages) << PAGE_SHIFT) /
QUARANTINE_FRACTION; QUARANTINE_FRACTION;
percpu_quarantines = QUARANTINE_PERCPU_SIZE * num_online_cpus(); percpu_quarantines = QUARANTINE_PERCPU_SIZE * num_online_cpus();
if (WARN_ONCE(new_quarantine_size < percpu_quarantines, new_quarantine_size = (new_quarantine_size < percpu_quarantines) ?
"Too little memory, disabling global KASAN quarantine.\n")) 0 : new_quarantine_size - percpu_quarantines;
new_quarantine_size = 0;
else
new_quarantine_size -= percpu_quarantines;
WRITE_ONCE(quarantine_size, new_quarantine_size); WRITE_ONCE(quarantine_size, new_quarantine_size);
last = global_quarantine.head; last = global_quarantine.head;
......
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