On Sun, 2010-03-14 at 16:18 +0530, Sachin Sant wrote: > On a PowerPC box, latest 34-rc1 git(d89b218b8...) fails to build > with CGROUPS_MEM_RES_CTRL_SWAP=y. > > LD init/built-in.o > LD .tmp_vmlinux1 > mm/built-in.o: In function __xchg: > arch/powerpc/include/asm/system.h:331: undefined reference to > .__xchg_called_with_bad_pointer > mm/built-in.o: In function __cmpxchg: > arch/powerpc/include/asm/system.h:474: undefined reference to > .__cmpxchg_called_with_bad_pointer > make: *** [.tmp_vmlinux1] Error 1 > > The code in question was added via commit 024914477e... > > memcg: move charges of anonymous swap
struct swap_cgroup
{
unsigned short id;
};
+unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
+ unsigned short old, unsigned short new)
+{
...
+ struct swap_cgroup *sc;
...
+ if (cmpxchg(&sc->id, old, new) == old)
On powerpc cmpxchg() currently only handles u32 & u64.
cheers
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