Hi! On Thu, Apr 08, 2021 at 07:04:35AM +0200, Christophe Leroy wrote: > Le 08/04/2021 à 03:18, Yu Kuai a écrit : > >-int boot_text_mapped __force_data = 0; > >+static int boot_text_mapped __force_data; > > Are you sure the initialisation to 0 can be removed ? Usually > initialisation to 0 is not needed because not initialised variables go in > the BSS section which is zeroed at startup. But here the variable is > flagged with __force_data so it is not going in the BSS section.
Any non-automatic (i.e. function-scope, not static) variable is initialised to 0. See e.g. C11 6.7.9/10 (this has been like that since times immemorial, C90 anyway). Segher
