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Message-Id: <1469471141-25669-1-git-send-email-william.c.roberts@intel.com> Date: Mon, 25 Jul 2016 11:25:41 -0700 From: william.c.roberts@...el.com To: linux-mm@...r.kernel.org, linux-kernel@...r.kernel.org Cc: linux@....linux.org.uk, akpm@...ux-foundation.org, keescook@...omium.org, tytso@....edu, arnd@...db.de, gregkh@...uxfoundation.org, catalin.marinas@....com, will.deacon@....com, ralf@...ux-mips.org, benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au, davem@...emloft.net, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org, viro@...iv.linux.org.uk, nnk@...gle.com, jeffv@...gle.com, salyzyn@...roid.com, dcashman@...roid.com, William Roberts <william.c.roberts@...el.com> Subject: [PATCH] randomize_range: use random long instead of int From: William Roberts <william.c.roberts@...el.com> Use a long when generating the random range rather than an int. This will produce better random distributions as well as matching all the types at hand. Signed-off-by: William Roberts <william.c.roberts@...el.com> --- drivers/char/random.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/char/random.c b/drivers/char/random.c index 0158d3b..bbf11b5 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1837,7 +1837,8 @@ randomize_range(unsigned long start, unsigned long end, unsigned long len) if (end <= start + len) return 0; - return PAGE_ALIGN(get_random_int() % range + start); + + return PAGE_ALIGN(get_random_long() % range + start); } /* Interface for in-kernel drivers of true hardware RNGs. -- 1.9.1
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