diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2023-02-03 21:17:17 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-02-08 21:42:12 +1100 |
| commit | d01dc25e47af9d30185ca12bb9e221d6af915d9f (patch) | |
| tree | 56053065e6db99164a103f0222a133c5e6dcf017 /arch/powerpc/mm | |
| parent | 45abf5d94b9bd0eebca5c7272788e2d16c8b5b43 (diff) | |
powerpc/64s/radix: mm->context.id should always be valid
The MMU_NO_CONTEXT checks are an unnecessary complication. Make
these warn to prepare to remove them in future.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230203111718.1149852-3-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_tlb.c | 39 |
1 files changed, 21 insertions, 18 deletions
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c index ac427fed681c..d6d072171797 100644 --- a/arch/powerpc/mm/book3s64/radix_tlb.c +++ b/arch/powerpc/mm/book3s64/radix_tlb.c @@ -700,12 +700,13 @@ static inline void _tlbiel_va_range_multicast(struct mm_struct *mm, */ void radix__local_flush_tlb_mm(struct mm_struct *mm) { - unsigned long pid; + unsigned long pid = mm->context.id; + + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) + return; preempt_disable(); - pid = mm->context.id; - if (pid != MMU_NO_CONTEXT) - _tlbiel_pid(pid, RIC_FLUSH_TLB); + _tlbiel_pid(pid, RIC_FLUSH_TLB); preempt_enable(); } EXPORT_SYMBOL(radix__local_flush_tlb_mm); @@ -713,12 +714,13 @@ EXPORT_SYMBOL(radix__local_flush_tlb_mm); #ifndef CONFIG_SMP void radix__local_flush_all_mm(struct mm_struct *mm) { - unsigned long pid; + unsigned long pid = mm->context.id; + + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) + return; preempt_disable(); - pid = mm->context.id; - if (pid != MMU_NO_CONTEXT) - _tlbiel_pid(pid, RIC_FLUSH_ALL); + _tlbiel_pid(pid, RIC_FLUSH_ALL); preempt_enable(); } EXPORT_SYMBOL(radix__local_flush_all_mm); @@ -732,12 +734,13 @@ static void __flush_all_mm(struct mm_struct *mm, bool fullmm) void radix__local_flush_tlb_page_psize(struct mm_struct *mm, unsigned long vmaddr, int psize) { - unsigned long pid; + unsigned long pid = mm->context.id; + + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) + return; preempt_disable(); - pid = mm->context.id; - if (pid != MMU_NO_CONTEXT) - _tlbiel_va(vmaddr, pid, psize, RIC_FLUSH_TLB); + _tlbiel_va(vmaddr, pid, psize, RIC_FLUSH_TLB); preempt_enable(); } @@ -945,7 +948,7 @@ void radix__flush_tlb_mm(struct mm_struct *mm) enum tlb_flush_type type; pid = mm->context.id; - if (unlikely(pid == MMU_NO_CONTEXT)) + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) return; preempt_disable(); @@ -985,7 +988,7 @@ static void __flush_all_mm(struct mm_struct *mm, bool fullmm) enum tlb_flush_type type; pid = mm->context.id; - if (unlikely(pid == MMU_NO_CONTEXT)) + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) return; preempt_disable(); @@ -1024,7 +1027,7 @@ void radix__flush_tlb_page_psize(struct mm_struct *mm, unsigned long vmaddr, enum tlb_flush_type type; pid = mm->context.id; - if (unlikely(pid == MMU_NO_CONTEXT)) + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) return; preempt_disable(); @@ -1130,7 +1133,7 @@ static inline void __radix__flush_tlb_range(struct mm_struct *mm, enum tlb_flush_type type; pid = mm->context.id; - if (unlikely(pid == MMU_NO_CONTEXT)) + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) return; preempt_disable(); @@ -1330,7 +1333,7 @@ static void __radix__flush_tlb_range_psize(struct mm_struct *mm, enum tlb_flush_type type; pid = mm->context.id; - if (unlikely(pid == MMU_NO_CONTEXT)) + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) return; fullmm = (end == TLB_FLUSH_ALL); @@ -1406,7 +1409,7 @@ void radix__flush_tlb_collapsed_pmd(struct mm_struct *mm, unsigned long addr) enum tlb_flush_type type; pid = mm->context.id; - if (unlikely(pid == MMU_NO_CONTEXT)) + if (WARN_ON_ONCE(pid == MMU_NO_CONTEXT)) return; /* 4k page size, just blow the world */ |