Messages in this thread Patch in this message | | | Date | Fri, 14 Oct 2022 12:42:17 +1100 | From | Stephen Rothwell <> | Subject | linux-next: build failure after merge of the kbuild tree |
| |
Hi all,
After merging the kbuild tree, today's linux-next build (i386 defconfig) failed like this:
In file included from arch/x86/kernel/head_32.S:29: arch/x86/include/asm/pgtable_32.h:68:5: error: "PTRS_PER_PMD" is not defined, evaluates to 0 [-Werror=undef] 68 | #if PTRS_PER_PMD > 1 | ^~~~~~~~~~~~ cc1: all warnings being treated as errors
Exposed by commit
0a7606a9832a ("kbuild: move -Wundef from KBUILD_CFLAGS to KBUILD_CPPFLAGS")
I have no idea what the root cause is. :-(
It is a great pity that this commit was not in linux-next before the merge window opened. :-(
I have applied the following hack for today.
From: Stephen Rothwell <sfr@canb.auug.org.au> Date: Fri, 14 Oct 2022 12:34:34 +1100 Subject: [PATCH] i386: hack for "kbuild: move -Wundef from KBUILD_CFLAGS to KBUILD_CPPFLAGS"
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> --- arch/x86/include/asm/pgtable_32.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/pgtable_32.h b/arch/x86/include/asm/pgtable_32.h index 7c9c968a42ef..0f3f186ca140 100644 --- a/arch/x86/include/asm/pgtable_32.h +++ b/arch/x86/include/asm/pgtable_32.h @@ -65,7 +65,7 @@ do { \ * With PAE paging (PTRS_PER_PMD > 1), we allocate PTRS_PER_PGD == 4 pages for * the PMD's in addition to the pages required for the last level pagetables. */ -#if PTRS_PER_PMD > 1 +#if defined(PTRS_PER_PMD) && (PTRS_PER_PMD > 1) #define PAGE_TABLE_SIZE(pages) (((pages) / PTRS_PER_PMD) + PTRS_PER_PGD) #else #define PAGE_TABLE_SIZE(pages) ((pages) / PTRS_PER_PGD) -- 2.35.1 -- Cheers, Stephen Rothwell [unhandled content-type:application/pgp-signature] | |