diff options
| author |   Will Deacon <will@kernel.org> | 2020-05-26 18:33:02 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-06-02 18:45:51 -0700 |
| commit | 1996d47a0db27a3071f1a6587123185ba98c4585 (patch) | |
| tree | 3b849e4c43873e8fc1fead51e5531bcb2d0d2b19 /tools/testing/selftests/bpf/prog_tests/autoload.c | |
| parent | sparc32: mm: Disable SPLIT_PTLOCK_CPUS (diff) | |
| download | wireguard-linux-1996d47a0db27a3071f1a6587123185ba98c4585.tar.xz wireguard-linux-1996d47a0db27a3071f1a6587123185ba98c4585.zip | |
sparc32: mm: Only call ctor()/dtor() functions for first and last user
The SRMMU page-table allocator allocates multiple PTE tables per page,
since they are only 1K in size. However, this means that calls to
pgtable_pte_page_{ctor,dtor}() must be serialised and performed only by
the first and last page-table allocation for the page respectively.
Use the page reference count to track how many PTE tables we have
allocated for a given page returned by the SRMMU allocator and only
call the ctor()/dtor() functions for the first and last user respectively.
Cc: David S. Miller <davem@davemloft.net>
Fixes: 8c8f3156dd40 ("sparc32: mm: Reduce allocation size for PMD and PTE tables")
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/autoload.c')
0 files changed, 0 insertions, 0 deletions