On Fri, 16 Dec 2022 11:20:12 PST (-0800), mike.krav...@oracle.com wrote:
zap_page_range was originally designed to unmap pages within an address
range that could span multiple vmas. While working on [1], it was
discovered that all callers of zap_page_range pass a range entirely within
a single vma. In addition, the mmu notification call within zap_page
range does not correctly handle ranges that span multiple vmas as calls
should be vma specific.
Instead of fixing zap_page_range, change all callers to use the new
routine zap_vma_page_range. zap_vma_page_range is just a wrapper around
zap_page_range_single passing in NULL zap details. The name is also
more in line with other exported routines that operate within a vma.
We can then remove zap_page_range.
Also, change madvise_dontneed_single_vma to use this new routine.
[1]
https://lore.kernel.org/linux-mm/20221114235507.294320-2-mike.krav...@oracle.com/
Suggested-by: Peter Xu <pet...@redhat.com>
Signed-off-by: Mike Kravetz <mike.krav...@oracle.com>
---
arch/arm64/kernel/vdso.c | 4 ++--
arch/powerpc/kernel/vdso.c | 2 +-
arch/powerpc/platforms/book3s/vas-api.c | 2 +-
arch/powerpc/platforms/pseries/vas.c | 2 +-
arch/riscv/kernel/vdso.c | 4 ++--
arch/s390/kernel/vdso.c | 2 +-
arch/s390/mm/gmap.c | 2 +-
arch/x86/entry/vdso/vma.c | 2 +-
drivers/android/binder_alloc.c | 2 +-
include/linux/mm.h | 7 ++++--
mm/madvise.c | 4 ++--
mm/memory.c | 30 -------------------------
mm/page-writeback.c | 2 +-
net/ipv4/tcp.c | 6 ++---
14 files changed, 22 insertions(+), 49 deletions(-)
[snip]
diff --git a/arch/riscv/kernel/vdso.c b/arch/riscv/kernel/vdso.c
index e410275918ac..a405119da2c0 100644
--- a/arch/riscv/kernel/vdso.c
+++ b/arch/riscv/kernel/vdso.c
@@ -127,10 +127,10 @@ int vdso_join_timens(struct task_struct *task, struct
time_namespace *ns)
unsigned long size = vma->vm_end - vma->vm_start;
if (vma_is_special_mapping(vma, vdso_info.dm))
- zap_page_range(vma, vma->vm_start, size);
+ zap_vma_page_range(vma, vma->vm_start, size);
#ifdef CONFIG_COMPAT
if (vma_is_special_mapping(vma, compat_vdso_info.dm))
- zap_page_range(vma, vma->vm_start, size);
+ zap_vma_page_range(vma, vma->vm_start, size);
#endif
}
Acked-by: Palmer Dabbelt <pal...@rivosinc.com> # RISC-V
Thanks!
