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Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/cpu/rdrand.c')
-rw-r--r--ANDROID_3.4.5/arch/x86/kernel/cpu/rdrand.c73
1 files changed, 0 insertions, 73 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/cpu/rdrand.c b/ANDROID_3.4.5/arch/x86/kernel/cpu/rdrand.c
deleted file mode 100644
index feca286c..00000000
--- a/ANDROID_3.4.5/arch/x86/kernel/cpu/rdrand.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * This file is part of the Linux kernel.
- *
- * Copyright (c) 2011, Intel Corporation
- * Authors: Fenghua Yu <fenghua.yu@intel.com>,
- * H. Peter Anvin <hpa@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
- */
-
-#include <asm/processor.h>
-#include <asm/archrandom.h>
-#include <asm/sections.h>
-
-static int __init x86_rdrand_setup(char *s)
-{
- setup_clear_cpu_cap(X86_FEATURE_RDRAND);
- return 1;
-}
-__setup("nordrand", x86_rdrand_setup);
-
-/* We can't use arch_get_random_long() here since alternatives haven't run */
-static inline int rdrand_long(unsigned long *v)
-{
- int ok;
- asm volatile("1: " RDRAND_LONG "\n\t"
- "jc 2f\n\t"
- "decl %0\n\t"
- "jnz 1b\n\t"
- "2:"
- : "=r" (ok), "=a" (*v)
- : "0" (RDRAND_RETRY_LOOPS));
- return ok;
-}
-
-/*
- * Force a reseed cycle; we are architecturally guaranteed a reseed
- * after no more than 512 128-bit chunks of random data. This also
- * acts as a test of the CPU capability.
- */
-#define RESEED_LOOP ((512*128)/sizeof(unsigned long))
-
-void __cpuinit x86_init_rdrand(struct cpuinfo_x86 *c)
-{
-#ifdef CONFIG_ARCH_RANDOM
- unsigned long tmp;
- int i, count, ok;
-
- if (!cpu_has(c, X86_FEATURE_RDRAND))
- return; /* Nothing to do */
-
- for (count = i = 0; i < RESEED_LOOP; i++) {
- ok = rdrand_long(&tmp);
- if (ok)
- count++;
- }
-
- if (count != RESEED_LOOP)
- clear_cpu_cap(c, X86_FEATURE_RDRAND);
-#endif
-}