[lkml]   [2021]   [Jul]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] mips: always link byteswap helpers into decompressor
On Fri, Jul 02, 2021 at 04:28:37PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <>
> My series to clean up the unaligned access implementation
> across architectures caused some mips randconfig builds to
> fail with:
> mips64-linux-ld: arch/mips/boot/compressed/decompress.o: in function `decompress_kernel':
> decompress.c:(.text.decompress_kernel+0x54): undefined reference to `__bswapsi2'
> It turns out that this problem has already been fixed for the XZ
> decompressor but now it also shows up in (at least) LZO and LZ4. From my
> analysis I concluded that the compiler could always have emitted those
> calls, but the different implementation allowed it to make otherwise
> better decisions about not inlining the byteswap, which results in the
> link error when the out-of-line code is missing.
> While it could be addressed by adding it to the two decompressor
> implementations that are known to be affected, but as this only adds
> 112 bytes to the kernel, the safer choice is to always add them.
> Fixes: c50ec6787536 ("MIPS: zboot: Fix the build with XZ compression on older GCC versions")
> Fixes: 0652035a5794 ("asm-generic: unaligned: remove byteshift helpers")
> Link:
> Link:
> Link:
> Link:
> Signed-off-by: Arnd Bergmann <>
> ---
> arch/mips/boot/compressed/Makefile | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)

applied to mips-next (for second pull request).


Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]

 \ /
  Last update: 2021-07-05 17:10    [W:0.035 / U:1.852 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site