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| author | Anders Roxell <anders.roxell@linaro.org> | 2022-08-10 14:43:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-10 11:32:32 +0300 |
| commit | 57edc43c15695339e66085900da0f2027f17b143 (patch) | |
| tree | ed4815630738977975169ade8eed9d9ee0346934 | |
| parent | ee907829b36949c452c6f89485cb2a58e97c048e (diff) | |
| download | linux-57edc43c15695339e66085900da0f2027f17b143.tar.xz | |
powerpc/mm: Rearrange if-else block to avoid clang warning
commit d78c8e32890ef7eca79ffd67c96022c7f9d8cce4 upstream.
Clang warns:
arch/powerpc/mm/book3s64/radix_tlb.c:1191:23: error: variable 'hstart' is uninitialized when used here
__tlbiel_va_range(hstart, hend, pid,
^~~~~~
arch/powerpc/mm/book3s64/radix_tlb.c:1191:31: error: variable 'hend' is uninitialized when used here
__tlbiel_va_range(hstart, hend, pid,
^~~~
Rework the 'if (IS_ENABLE(CONFIG_TRANSPARENT_HUGEPAGE))' so hstart/hend
is always initialized to silence the warnings. That will also simplify
the 'else' path. Clang is getting confused with these warnings, but the
warnings is a false-positive.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220810114318.3220630-1-anders.roxell@linaro.org
Signed-off-by: Daniel Díaz <daniel.diaz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_tlb.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c index 4e29b619578c..6d7a1ef723e6 100644 --- a/arch/powerpc/mm/book3s64/radix_tlb.c +++ b/arch/powerpc/mm/book3s64/radix_tlb.c @@ -1179,15 +1179,12 @@ static inline void __radix__flush_tlb_range(struct mm_struct *mm, } } } else { - bool hflush = false; + bool hflush; unsigned long hstart, hend; - if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) { - hstart = (start + PMD_SIZE - 1) & PMD_MASK; - hend = end & PMD_MASK; - if (hstart < hend) - hflush = true; - } + hstart = (start + PMD_SIZE - 1) & PMD_MASK; + hend = end & PMD_MASK; + hflush = IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && hstart < hend; if (type == FLUSH_TYPE_LOCAL) { asm volatile("ptesync": : :"memory"); |