diff options
| author | Will Deacon <will@kernel.org> | 2019-10-30 18:15:01 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-07-21 11:50:36 +0200 |
| commit | bb7cdd38185a4f9fa32e62db115c2c6dceb2b621 (patch) | |
| tree | e595c58c6d7cdb11ba37afcf5e1b35dc3708b0ad /arch/alpha/include/asm/pgtable.h | |
| parent | vhost: Remove redundant use of read_barrier_depends() barrier (diff) | |
| download | linux-bb7cdd38185a4f9fa32e62db115c2c6dceb2b621.tar.xz linux-bb7cdd38185a4f9fa32e62db115c2c6dceb2b621.zip | |
alpha: Replace smp_read_barrier_depends() usage with smp_[r]mb()
In preparation for removing smp_read_barrier_depends() altogether,
move the Alpha code over to using smp_rmb() and smp_mb() directly.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/alpha/include/asm/pgtable.h')
| -rw-r--r-- | arch/alpha/include/asm/pgtable.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h index 162c17b2631f..660b14ce1317 100644 --- a/arch/alpha/include/asm/pgtable.h +++ b/arch/alpha/include/asm/pgtable.h @@ -277,9 +277,9 @@ extern inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= __DIRTY_BITS; retur extern inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= __ACCESS_BITS; return pte; } /* - * The smp_read_barrier_depends() in the following functions are required to - * order the load of *dir (the pointer in the top level page table) with any - * subsequent load of the returned pmd_t *ret (ret is data dependent on *dir). + * The smp_rmb() in the following functions are required to order the load of + * *dir (the pointer in the top level page table) with any subsequent load of + * the returned pmd_t *ret (ret is data dependent on *dir). * * If this ordering is not enforced, the CPU might load an older value of * *ret, which may be uninitialized data. See mm/memory.c:__pte_alloc for @@ -293,7 +293,7 @@ extern inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= __ACCESS_BITS; retu extern inline pmd_t * pmd_offset(pud_t * dir, unsigned long address) { pmd_t *ret = (pmd_t *) pud_page_vaddr(*dir) + ((address >> PMD_SHIFT) & (PTRS_PER_PAGE - 1)); - smp_read_barrier_depends(); /* see above */ + smp_rmb(); /* see above */ return ret; } #define pmd_offset pmd_offset @@ -303,7 +303,7 @@ extern inline pte_t * pte_offset_kernel(pmd_t * dir, unsigned long address) { pte_t *ret = (pte_t *) pmd_page_vaddr(*dir) + ((address >> PAGE_SHIFT) & (PTRS_PER_PAGE - 1)); - smp_read_barrier_depends(); /* see above */ + smp_rmb(); /* see above */ return ret; } #define pte_offset_kernel pte_offset_kernel |