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| author | Vincent Chen <vincentc@andestech.com> | 2018-05-14 18:56:35 +0800 |
|---|---|---|
| committer | Greentime Hu <greentime@andestech.com> | 2018-05-23 13:26:22 +0800 |
| commit | aaaaba57509526ce924f997d8690ee9e0c93945a (patch) | |
| tree | d91740ec7b04af9b924c205ccb8876dcb9c3f442 /arch/nds32 | |
| parent | 5b9f95699b2166e06b7d7820c8173fdbff0ddf35 (diff) | |
| download | op-kernel-dev-aaaaba57509526ce924f997d8690ee9e0c93945a.zip op-kernel-dev-aaaaba57509526ce924f997d8690ee9e0c93945a.tar.gz | |
nds32: Disable local irq before calling cpu_dcache_wb_page in copy_user_highpage
In order to ensure that all data in source page has been written back
to memory before copy_page, the local irq shall be disabled before
calling cpu_dcache_wb_page(). In addition, removing unneeded page
invalidation for 'to' page.
Signed-off-by: Vincent Chen <vincentc@andestech.com>
Reviewed-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Diffstat (limited to 'arch/nds32')
| -rw-r--r-- | arch/nds32/mm/cacheflush.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/nds32/mm/cacheflush.c b/arch/nds32/mm/cacheflush.c index ae31cd2..ce8fd34 100644 --- a/arch/nds32/mm/cacheflush.c +++ b/arch/nds32/mm/cacheflush.c @@ -175,11 +175,9 @@ void copy_user_highpage(struct page *to, struct page *from, pto = page_to_phys(to); pfrom = page_to_phys(from); + local_irq_save(flags); if (aliasing(vaddr, (unsigned long)kfrom)) cpu_dcache_wb_page((unsigned long)kfrom); - if (aliasing(vaddr, (unsigned long)kto)) - cpu_dcache_inval_page((unsigned long)kto); - local_irq_save(flags); vto = kremap0(vaddr, pto); vfrom = kremap1(vaddr, pfrom); copy_page((void *)vto, (void *)vfrom); |
