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| author | David S. Miller <davem@davemloft.net> | 2016-03-08 17:34:12 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-08 17:34:12 (GMT) |
| commit | 810813c47a564416f6306ae214e2661366c987a7 (patch) | |
| tree | f0d1f856d4b0024324f642fe519963248828b83f /arch/powerpc/mm/hugetlbpage-book3e.c | |
| parent | d66ab51442211158b677c2f12310c314d9587f74 (diff) | |
| parent | e2857b8f11a289ed2b61d18d0665e05c1053c446 (diff) | |
| download | linux-810813c47a564416f6306ae214e2661366c987a7.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Several cases of overlapping changes, as well as one instance
(vxlan) of a bug fix in 'net' overlapping with code movement
in 'net-next'.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/powerpc/mm/hugetlbpage-book3e.c')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage-book3e.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hugetlbpage-book3e.c b/arch/powerpc/mm/hugetlbpage-book3e.c index 7e6d088..83a8be7 100644 --- a/arch/powerpc/mm/hugetlbpage-book3e.c +++ b/arch/powerpc/mm/hugetlbpage-book3e.c @@ -8,6 +8,8 @@ #include <linux/mm.h> #include <linux/hugetlb.h> +#include <asm/mmu.h> + #ifdef CONFIG_PPC_FSL_BOOK3E #ifdef CONFIG_PPC64 static inline int tlb1_next(void) @@ -60,6 +62,14 @@ static inline void book3e_tlb_lock(void) unsigned long tmp; int token = smp_processor_id() + 1; + /* + * Besides being unnecessary in the absence of SMT, this + * check prevents trying to do lbarx/stbcx. on e5500 which + * doesn't implement either feature. + */ + if (!cpu_has_feature(CPU_FTR_SMT)) + return; + asm volatile("1: lbarx %0, 0, %1;" "cmpwi %0, 0;" "bne 2f;" @@ -80,6 +90,9 @@ static inline void book3e_tlb_unlock(void) { struct paca_struct *paca = get_paca(); + if (!cpu_has_feature(CPU_FTR_SMT)) + return; + isync(); paca->tcd_ptr->lock = 0; } |