On Fri, May 15, 2020 at 11:05:40AM -0700, Bob Haarman wrote:
> `jiffies`
[...]
> `jiffies_64`
[...]
> ```
> In LLD, symbol assignments in linker scripts override definitions in
> object files. GNU ld appears to have the same behavior. It would
> probably make sense for LLD to error "duplicate
On Mon, May 18, 2020 at 08:17:42PM -0700, Andi Kleen wrote:
> > Instead, we can avoid the ODR violation by matching other arch's by
> > defining jiffies only by linker script. For -fno-semantic-interposition
> > + Full LTO, there is no longer a global definition of jiffies for the
> > compiler to
> Instead, we can avoid the ODR violation by matching other arch's by
> defining jiffies only by linker script. For -fno-semantic-interposition
> + Full LTO, there is no longer a global definition of jiffies for the
> compiler to produce a local symbol which the linker script won't ensure
>
`jiffies` and `jiffies_64` are meant to alias (two different symbols
that share the same address). Most architectures make the symbols alias
to the same address via linker script assignment in their
arch//kernel/vmlinux.lds.S:
jiffies = jiffies_64;
which is effectively a definition of jiffies.
4 matches
Mail list logo
