[Bug c/97445] Some fonctions marked static inline in Linux kernel are not inlined

[christophe.leroy at csgroup dot eu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97445

--- Comment #26 from Christophe Leroy <christophe.leroy at csgroup dot eu> ---
In reality it is not perfect with GCC 9.2, but that's better, only two
instances are unused. 

[root@po17688vm linux-powerpc]# ppc-linux-objdump -d vmlinux | grep get_order
c00c0470 <get_order>:
c013e238 <get_order>:
c0225f68 <get_order>:
c041ebfc:       4b ca 18 75     bl      c00c0470 <get_order>
c042d34c:       4b c9 31 25     bl      c00c0470 <get_order>

In the few places where get_order() remains with GCC 9.2, I get the following
warning:

warning: inlining failed in call to 'get_order': call is unlikely and code size
would grow [-Winline]