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Date: Sat, 20 Nov 2021 11:18:39 +0800 From: Jubin Zhong <zhongjubin@...wei.com> To: <lasse.collin@...aani.org> CC: <akpm@...ux-foundation.org>, <liaohua4@...wei.com>, <linux-kernel@...r.kernel.org>, <wangfangpeng1@...wei.com>, <zhongjubin@...wei.com> Subject: Re: [PATCH] kbuild: Enable armthumb BCJ filter for Thumb-2 kernel > If a Thumb-2 kernel will always use the ARM-Thumb BCJ filter, one can > save a few bytes from the pre-boot code by omitting the ARM BCJ filter: > > --- a/lib/decompress_unxz.c > +++ b/lib/decompress_unxz.c > @@ -129,7 +129,11 @@ > # define XZ_DEC_POWERPC > #endif > #ifdef CONFIG_ARM > -# define XZ_DEC_ARM > +# ifdef CONFIG_THUMB2_KERNEL > +# define XZ_DEC_ARMTHUMB > +# else > +# define XZ_DEC_ARM > +# endif > #endif > #ifdef CONFIG_IA64 > # define XZ_DEC_IA64 > >> --- a/scripts/xz_wrap.sh >> +++ b/scripts/xz_wrap.sh >> @@ -8,6 +8,7 @@ >> # This file has been put into the public domain. >> # You can do whatever you want with this file. >> # >> +. include/config/auto.conf > > I suggest adding an empty line before this new line so that it is > clearly separated from the header comment. > >> +if [ -n "${CONFIG_THUMB2_KERNEL}" ];then > > I suggest adding a space after the semi-colon: ]; then > > With or without the above modifications: Thanks for your advices. I will incorporate the above modifications and send patch v2.
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