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author | Al Viro <viro@zeniv.linux.org.uk> | 2017-04-07 17:20:01 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-05-15 23:40:22 -0400 |
commit | 82985258390e85289940d3663344197344e071f2 (patch) | |
tree | 9209037b20e4c5117b87a03e0add1c305c4eb25f /lib | |
parent | 2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff) | |
download | linux-82985258390e85289940d3663344197344e071f2.tar.bz2 |
kill strlen_user()
no callers, no consistent semantics, no sane way to use it...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/strnlen_user.c | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/lib/strnlen_user.c b/lib/strnlen_user.c index 8e105ed4df12..a5f567747ced 100644 --- a/lib/strnlen_user.c +++ b/lib/strnlen_user.c @@ -121,37 +121,3 @@ long strnlen_user(const char __user *str, long count) return 0; } EXPORT_SYMBOL(strnlen_user); - -/** - * strlen_user: - Get the size of a user string INCLUDING final NUL. - * @str: The string to measure. - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * Get the size of a NUL-terminated string in user space. - * - * Returns the size of the string INCLUDING the terminating NUL. - * On exception, returns 0. - * - * If there is a limit on the length of a valid string, you may wish to - * consider using strnlen_user() instead. - */ -long strlen_user(const char __user *str) -{ - unsigned long max_addr, src_addr; - - max_addr = user_addr_max(); - src_addr = (unsigned long)str; - if (likely(src_addr < max_addr)) { - unsigned long max = max_addr - src_addr; - long retval; - - user_access_begin(); - retval = do_strnlen_user(str, ~0ul, max); - user_access_end(); - return retval; - } - return 0; -} -EXPORT_SYMBOL(strlen_user); |