On Mon, 22 Oct 2018, [email protected] wrote:
Fixes the warning reported by Clang: security/keys/trusted.c:146:17: warning: passing an object that undergoes default argument promotion to 'va_start' has undefined behavior [-Wvarargs] va_start(argp, h3); ^ security/keys/trusted.c:126:37: note: parameter of type 'unsigned char' is declared here unsigned char *h2, unsigned char h3, ...) ^ Specifically, it seems that both the C90 (4.8.1.1) and C11 (7.16.1.4) standards explicitly call this out as undefined behavior:The parameter parmN is the identifier of the rightmost parameter in the variable parameter list in the function definition (the one just before the ...). If the parameter parmN is declared with ... or with a type that is not compatible with the type that results after application of the default argument promotions, the behavior is undefined. Link: https://github.com/ClangBuiltLinux/linux/issues/41 Link: https://www.eskimo.com/~scs/cclass/int/sx11c.html Suggested-by: David Laight <[email protected]> Suggested-by: Denis Kenzior <[email protected]> Suggested-by: James Bottomley <[email protected]> Suggested-by: Nathan Chancellor <[email protected]> Signed-off-by: Nick Desaulniers <[email protected]>
Reviewed-by: Jarkko Sakkinen <[email protected]> /Jarkko
