/* * Copyright (c) by Jaroslav Kysela * * Misc memory accessors * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include /** * copy_to_user_fromio - copy data from mmio-space to user-space * @dst: the destination pointer on user-space * @src: the source pointer on mmio * @count: the data size to copy in bytes * * Copies the data from mmio-space to user-space. * * Return: Zero if successful, or non-zero on failure. */ int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count) { #if defined(__i386__) || defined(CONFIG_SPARC32) return copy_to_user(dst, (const void __force*)src, count) ? -EFAULT : 0; #else char buf[256]; while (count) { size_t c = count; if (c > sizeof(buf)) c = sizeof(buf); memcpy_fromio(buf, (void __iomem *)src, c); if (copy_to_user(dst, buf, c)) return -EFAULT; count -= c; dst += c; src += c; } return 0; #endif } EXPORT_SYMBOL(copy_to_user_fromio); /** * copy_from_user_toio - copy data from user-space to mmio-space * @dst: the destination pointer on mmio-space * @src: the source pointer on user-space * @count: the data size to copy in bytes * * Copies the data from user-space to mmio-space. * * Return: Zero if successful, or non-zero on failure. */ int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count) { #if defined(__i386__) || defined(CONFIG_SPARC32) return copy_from_user((void __force *)dst, src, count) ? -EFAULT : 0; #else char buf[256]; while (count) { size_t c = count; if (c > sizeof(buf)) c = sizeof(buf); if (copy_from_user(buf, src, c)) return -EFAULT; memcpy_toio(dst, buf, c); count -= c; dst += c; src += c; } return 0; #endif } EXPORT_SYMBOL(copy_from_user_toio); ='range'>range
path: root/security/selinux/nlmsgtab.c
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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-11 10:17:39 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-11 10:17:39 -0800
commit2e4333c14de06a333783d6812cf3c4998f78b0c8 (patch)
tree368428514d70f34f2261c7f954f241f886d6bb51 /security/selinux/nlmsgtab.c
parent045169816b31b10faed984b01c390db1b32ee4c1 (diff)
parentba735155b9647b6167fd50276ca0fbfbce4e836c (diff)
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle: "Two more MIPS fixes for 4.9: - RTC: Return -ENODEV so an external RTC will be tried - Fix mask of GPE frequency These two have been tested on Imagination's automated test system and also both received positive reviews on the linux-mips mailing list" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: Lantiq: Fix mask of GPE frequency MIPS: Return -ENODEV from weak implementation of rtc_mips_set_time
Diffstat (limited to 'security/selinux/nlmsgtab.c')