Messages in this thread | | | Date | Mon, 16 May 2022 06:10:23 -0700 | From | Guenter Roeck <> | Subject | Re: [PATCH] [v2] Kbuild: move to -std=gnu11 |
| |
On Mon, Feb 28, 2022 at 11:27:43AM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@arndb.de> > > During a patch discussion, Linus brought up the option of changing > the C standard version from gnu89 to gnu99, which allows using variable > declaration inside of a for() loop. While the C99, C11 and later standards > introduce many other features, most of these are already available in > gnu89 as GNU extensions as well.
The downside is that backporting affected patches to older kernel branches now fails with error messages such as
mm/kfence/core.c: In function ‘kfence_init_pool’: mm/kfence/core.c:595:2: error: ‘for’ loop initial declarations are only allowed in C99 or C11 mode
Just something to keep in mind when writing patches.
Guenter
| |