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Date:	Mon, 16 Jun 2014 13:29:27 +0300
From:	Dan Carpenter <>
To:	Jiri Kosina <>
Cc:	Linus Torvalds <>,
	"Paul E. McKenney" <>,
	Peter Zijlstra <>,
	Andrew Morton <>,
	Martin Jambor <>, Petr Mladek <>,,,
Subject: Re: [PATCH] tell gcc optimizer to never introduce new data races

Adding "--param allow-store-data-races=0" to the GCC options for the
kernel breaks C=1 because Sparse isn't expecting a GCC option with that

It thinks allow-store-data-races=0 is the name of the file we are trying
to test.  Try use Sparse on linux-next to see the problem.

$ make C=2 mm/slab_common.o
  CHK     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    scripts/
  CHECK   scripts/mod/empty.c
No such file: allow-store-data-races=0
make[2]: *** [scripts/mod/empty.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2

dan carpenter

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