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authorMark Rutland <mark.rutland@arm.com>2019-02-11 16:20:35 +0300
committerIngo Molnar <mingo@kernel.org>2019-02-13 10:07:31 +0300
commit0cf264b3133dce56a60ca8b4335d1f76fe26870a (patch)
tree9afbe4db4847974c5f357fde4fd76f92aaa37b01 /include/asm-generic/atomic-long.h
parentb14e77f89aca1c2763f65dc274b5837a185ab13f (diff)
downloadlinux-0cf264b3133dce56a60ca8b4335d1f76fe26870a.tar.xz
locking/atomics: Check atomic headers with sha1sum
We currently check the atomic headers at build-time to ensure they haven't been modified directly, and these checks require regenerating the headers in full. As this takes a few seconds, even when parallelized, this is too slow to run for every kernel build. Instead, we can generate a hash of each header as we generate them, which we can cheaply check at build time (~0.16s for all headers). This patch does so, updating headers with their hashes using the new gen-atomics.sh script. As some users apparently build the kernel wihout coreutils, lacking sha1sum, the checks are skipped in this case. Presumably, most developers have a working coreutils installation. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: anders.roxell@linaro.org Cc: linux-kernel@vger.kernel.rg Cc: naresh.kamboju@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/asm-generic/atomic-long.h')
-rw-r--r--include/asm-generic/atomic-long.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-generic/atomic-long.h b/include/asm-generic/atomic-long.h
index a833d385a70b..881c7e27af28 100644
--- a/include/asm-generic/atomic-long.h
+++ b/include/asm-generic/atomic-long.h
@@ -1010,3 +1010,4 @@ atomic_long_dec_if_positive(atomic_long_t *v)
#endif /* CONFIG_64BIT */
#endif /* _ASM_GENERIC_ATOMIC_LONG_H */
+// 77558968132ce4f911ad53f6f52ce423006f6268