X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=probes%2Flttng-probe-user.c;h=0d1f95fe00861aec694136b514e07523e285898d;hb=HEAD;hp=d0b5cf297367ce3c209b69ecb491e969ec321270;hpb=2a8b83a12300795c2f82ba19826e2eeaa5135030;p=lttng-modules.git diff --git a/probes/lttng-probe-user.c b/probes/lttng-probe-user.c deleted file mode 100644 index d0b5cf29..00000000 --- a/probes/lttng-probe-user.c +++ /dev/null @@ -1,54 +0,0 @@ -/* - * lttng-probe-user.c - * - * Copyright (C) 2012 Mathieu Desnoyers - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; only - * version 2.1 of the License. - * - * This library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include -#include "lttng-probe-user.h" - -/* - * Calculate string length. Include final null terminating character if there is - * one, or ends at first fault. Disabling page faults ensures that we can safely - * call this from pretty much any context, including those where the caller - * holds mmap_sem, or any lock which nests in mmap_sem. - */ -long lttng_strlen_user_inatomic(const char *addr) -{ - long count = 0; - mm_segment_t old_fs = get_fs(); - - set_fs(KERNEL_DS); - pagefault_disable(); - for (;;) { - char v; - unsigned long ret; - - ret = __copy_from_user_inatomic(&v, - (__force const char __user *)(addr), - sizeof(v)); - if (unlikely(ret > 0)) - break; - count++; - if (unlikely(!v)) - break; - addr++; - } - pagefault_enable(); - set_fs(old_fs); - return count; -}