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| author | Tiwei Bie <tiwei.btw@antgroup.com> | 2024-10-11 18:23:53 +0800 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2024-10-23 09:52:49 +0200 |
| commit | 2717c6b649e1840328c2758a478bf4034a22ac3e (patch) | |
| tree | e25a72d6d3a34140f62d645ba72c6ae78cbedb65 /arch/um/include/shared/skas/stub-data.h | |
| parent | 90daca7c8f6f33e9482591446d2e76b18a21be49 (diff) | |
| download | linux-2717c6b649e1840328c2758a478bf4034a22ac3e.tar.gz linux-2717c6b649e1840328c2758a478bf4034a22ac3e.tar.bz2 linux-2717c6b649e1840328c2758a478bf4034a22ac3e.zip | |
um: Abandon the _PAGE_NEWPROT bit
When a PTE is updated in the page table, the _PAGE_NEWPAGE bit will
always be set. And the corresponding page will always be mapped or
unmapped depending on whether the PTE is present or not. The check
on the _PAGE_NEWPROT bit is not really reachable. Abandoning it will
allow us to simplify the code and remove the unreachable code.
Reviewed-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20241011102354.1682626-2-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'arch/um/include/shared/skas/stub-data.h')
| -rw-r--r-- | arch/um/include/shared/skas/stub-data.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/um/include/shared/skas/stub-data.h b/arch/um/include/shared/skas/stub-data.h index 3fbdda727373..81a4cace032c 100644 --- a/arch/um/include/shared/skas/stub-data.h +++ b/arch/um/include/shared/skas/stub-data.h @@ -30,7 +30,6 @@ enum stub_syscall_type { STUB_SYSCALL_UNSET = 0, STUB_SYSCALL_MMAP, STUB_SYSCALL_MUNMAP, - STUB_SYSCALL_MPROTECT, }; struct stub_syscall { |