From: Heiko Carstens Date: Wed, 11 May 2022 12:05:27 +0000 (+0200) Subject: s390/entry: workaround llvm's IAS limitations X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4c25f0ff6336738fcb03216ae103c3c17908304a;p=linux.git s390/entry: workaround llvm's IAS limitations llvm's integrated assembler cannot handle immediate values which are calculated with two local labels: :3:13: error: invalid operand for instruction clgfi %r14,.Lsie_done - .Lsie_gmap Workaround this by adding clang specific code which reads the specific value from memory. Since this code is within the hot paths of the kernel and adds an additional memory reference, keep the original code, and add ifdef'ed code. Acked-by: Alexander Gordeev Link: https://lore.kernel.org/r/20220511120532.2228616-5-hca@linux.ibm.com Signed-off-by: Heiko Carstens --- diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index a6b45eaa34506..df41132ccd068 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -172,9 +172,19 @@ _LPP_OFFSET = __LC_LPP lgr %r14,\reg larl %r13,\start slgr %r14,%r13 - lghi %r13,\end - \start - clgr %r14,%r13 +#ifdef CONFIG_AS_IS_LLVM + clgfrl %r14,.Lrange_size\@ +#else + clgfi %r14,\end - \start +#endif jhe \outside_label +#ifdef CONFIG_AS_IS_LLVM + .section .rodata, "a" + .align 4 +.Lrange_size\@: + .long \end - \start + .previous +#endif .endm .macro SIEEXIT