diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2023-10-23 20:23:19 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-10-23 20:33:19 +1100 |
| commit | aad26d3b6af13c055b1d05dd253d2484551bde55 (patch) | |
| tree | a55522255682da9477612581c96f43a445e17bd0 /arch/powerpc/include/asm/book3s | |
| parent | ca2b746d5f91a37f01baedff54b9315a50ee617d (diff) | |
powerpc/32s: Implement local_flush_tlb_page_psize()
There's a single call to local_flush_tlb_page_psize() in the code
patching code. That call is never executed on 32-bit Book3S,
because it's guarded by mm_patch_enabled() which is essentially a
radix_enabled() check, which is always false on 32s.
However depending on how the optimiser sees things it may still trip
over the BUILD_BUG() in the 32s stub of local_flush_tlb_page_psize().
To avoid that, implement it in terms of flush_range() so that if it ever
becomes called it should function, even if not optimally.
Note that flush_range() deals with page aligning the address and so on,
and that 32s doesn't support huge pages so there should be no issue with
non-standard page sizes needing to be flushed.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231023092319.1507325-1-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/include/asm/book3s')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/32/tlbflush.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/book3s/32/tlbflush.h b/arch/powerpc/include/asm/book3s/32/tlbflush.h index 4be572908124..e43534da5207 100644 --- a/arch/powerpc/include/asm/book3s/32/tlbflush.h +++ b/arch/powerpc/include/asm/book3s/32/tlbflush.h @@ -80,7 +80,7 @@ static inline void local_flush_tlb_page(struct vm_area_struct *vma, static inline void local_flush_tlb_page_psize(struct mm_struct *mm, unsigned long vmaddr, int psize) { - BUILD_BUG(); + flush_range(mm, vmaddr, vmaddr); } static inline void local_flush_tlb_mm(struct mm_struct *mm) |