4.18-stable review patch. If anyone has any objections, please let me know.
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From: Christophe Leroy christophe.leroy@c-s.fr
[ Upstream commit 37e9c674e7e6f445e12cb1151017bd4bacdd1e2d ]
This patch fixes the following warnings (obtained with make W=1).
arch/powerpc/mm/slice.c: In function 'slice_range_to_mask': arch/powerpc/mm/slice.c:73:12: error: comparison is always true due to limited range of data type [-Werror=type-limits] if (start < SLICE_LOW_TOP) { ^ arch/powerpc/mm/slice.c:81:20: error: comparison is always false due to limited range of data type [-Werror=type-limits] if ((start + len) > SLICE_LOW_TOP) { ^ arch/powerpc/mm/slice.c: In function 'slice_mask_for_free': arch/powerpc/mm/slice.c:136:17: error: comparison is always true due to limited range of data type [-Werror=type-limits] if (high_limit <= SLICE_LOW_TOP) ^ arch/powerpc/mm/slice.c: In function 'slice_check_range_fits': arch/powerpc/mm/slice.c:185:12: error: comparison is always true due to limited range of data type [-Werror=type-limits] if (start < SLICE_LOW_TOP) { ^ arch/powerpc/mm/slice.c:195:39: error: comparison is always false due to limited range of data type [-Werror=type-limits] if (SLICE_NUM_HIGH && ((start + len) > SLICE_LOW_TOP)) { ^ arch/powerpc/mm/slice.c: In function 'slice_scan_available': arch/powerpc/mm/slice.c:306:11: error: comparison is always true due to limited range of data type [-Werror=type-limits] if (addr < SLICE_LOW_TOP) { ^ arch/powerpc/mm/slice.c: In function 'get_slice_psize': arch/powerpc/mm/slice.c:709:11: error: comparison is always true due to limited range of data type [-Werror=type-limits] if (addr < SLICE_LOW_TOP) { ^
Signed-off-by: Christophe Leroy christophe.leroy@c-s.fr Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/powerpc/mm/slice.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-)
--- a/arch/powerpc/mm/slice.c +++ b/arch/powerpc/mm/slice.c @@ -61,6 +61,13 @@ static void slice_print_mask(const char
#endif
+static inline bool slice_addr_is_low(unsigned long addr) +{ + u64 tmp = (u64)addr; + + return tmp < SLICE_LOW_TOP; +} + static void slice_range_to_mask(unsigned long start, unsigned long len, struct slice_mask *ret) { @@ -70,7 +77,7 @@ static void slice_range_to_mask(unsigned if (SLICE_NUM_HIGH) bitmap_zero(ret->high_slices, SLICE_NUM_HIGH);
- if (start < SLICE_LOW_TOP) { + if (slice_addr_is_low(start)) { unsigned long mend = min(end, (unsigned long)(SLICE_LOW_TOP - 1));
@@ -78,7 +85,7 @@ static void slice_range_to_mask(unsigned - (1u << GET_LOW_SLICE_INDEX(start)); }
- if ((start + len) > SLICE_LOW_TOP) { + if (SLICE_NUM_HIGH && !slice_addr_is_low(end)) { unsigned long start_index = GET_HIGH_SLICE_INDEX(start); unsigned long align_end = ALIGN(end, (1UL << SLICE_HIGH_SHIFT)); unsigned long count = GET_HIGH_SLICE_INDEX(align_end) - start_index; @@ -133,7 +140,7 @@ static void slice_mask_for_free(struct m if (!slice_low_has_vma(mm, i)) ret->low_slices |= 1u << i;
- if (high_limit <= SLICE_LOW_TOP) + if (slice_addr_is_low(high_limit - 1)) return;
for (i = 0; i < GET_HIGH_SLICE_INDEX(high_limit); i++) @@ -182,7 +189,7 @@ static bool slice_check_range_fits(struc unsigned long end = start + len - 1; u64 low_slices = 0;
- if (start < SLICE_LOW_TOP) { + if (slice_addr_is_low(start)) { unsigned long mend = min(end, (unsigned long)(SLICE_LOW_TOP - 1));
@@ -192,7 +199,7 @@ static bool slice_check_range_fits(struc if ((low_slices & available->low_slices) != low_slices) return false;
- if (SLICE_NUM_HIGH && ((start + len) > SLICE_LOW_TOP)) { + if (SLICE_NUM_HIGH && !slice_addr_is_low(end)) { unsigned long start_index = GET_HIGH_SLICE_INDEX(start); unsigned long align_end = ALIGN(end, (1UL << SLICE_HIGH_SHIFT)); unsigned long count = GET_HIGH_SLICE_INDEX(align_end) - start_index; @@ -303,7 +310,7 @@ static bool slice_scan_available(unsigne int end, unsigned long *boundary_addr) { unsigned long slice; - if (addr < SLICE_LOW_TOP) { + if (slice_addr_is_low(addr)) { slice = GET_LOW_SLICE_INDEX(addr); *boundary_addr = (slice + end) << SLICE_LOW_SHIFT; return !!(available->low_slices & (1u << slice)); @@ -706,7 +713,7 @@ unsigned int get_slice_psize(struct mm_s
VM_BUG_ON(radix_enabled());
- if (addr < SLICE_LOW_TOP) { + if (slice_addr_is_low(addr)) { psizes = mm->context.low_slices_psize; index = GET_LOW_SLICE_INDEX(addr); } else {