• Mark Rutland's avatar
    locking/atomics: Check atomic headers with sha1sum · 0cf264b3
    Mark Rutland authored
    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: default avatarMark Rutland <mark.rutland@arm.com>
    Acked-by: default avatarWill 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: default avatarIngo Molnar <mingo@kernel.org>
    0cf264b3
atomic-long.h 18.8 KB