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| author | Helge Deller <deller@kernel.org> | 2024-01-28 09:53:55 +0100 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-28 21:29:23 -0500 |
| commit | eba38cc7578bef94865341c73608bdf49193a51d (patch) | |
| tree | 2abf099030a1bff74497ff6b7bf2c3b21201d8df | |
| parent | d2fda304bb739b97c1a3e46e39700eb49f07a62c (diff) | |
| download | lwn-eba38cc7578bef94865341c73608bdf49193a51d.tar.gz lwn-eba38cc7578bef94865341c73608bdf49193a51d.zip | |
bcachefs: Fix build on parisc by avoiding __multi3()
The gcc compiler on paric does support the __int128 type, although the
architecture does not have native 128-bit support.
The effect is, that the bcachefs u128_square() function will pull in the
libgcc __multi3() helper, which breaks the kernel build when bcachefs is
built as module since this function isn't currently exported in
arch/parisc/kernel/parisc_ksyms.c.
The build failure can be seen in the latest debian kernel build at:
https://buildd.debian.org/status/fetch.php?pkg=linux&arch=hppa&ver=6.7.1-1%7Eexp1&stamp=1706132569&raw=0
We prefer to not export that symbol, so fall back to the optional 64-bit
implementation provided by bcachefs and thus avoid usage of __multi3().
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | fs/bcachefs/mean_and_variance.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/bcachefs/mean_and_variance.h b/fs/bcachefs/mean_and_variance.h index b2be565bb8f2..64df11ab422b 100644 --- a/fs/bcachefs/mean_and_variance.h +++ b/fs/bcachefs/mean_and_variance.h @@ -17,7 +17,7 @@ * Rust and rustc has issues with u128. */ -#if defined(__SIZEOF_INT128__) && defined(__KERNEL__) +#if defined(__SIZEOF_INT128__) && defined(__KERNEL__) && !defined(CONFIG_PARISC) typedef struct { unsigned __int128 v; |