s390/boot: Fix physical memory search range

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search_mem_end() calculates the number of 1MB blocks with a signed int
literal. CONFIG_MAX_PHYSMEM_BITS values of 51 and above either overflow
the signed int or shift beyond its width. This produces an invalid search
range when the binary-search memory detection fallback is used.

Use an unsigned long literal so the full supported physical address range
is represented.

Fixes: 54c57795e8 ("s390/mem_detect: replace tprot loop with binary search")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

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Vasily Gorbik 2026-08-19 12:30:05 +02:00 • committed by Heiko Carstens

parent bb06e5a2a0

commit a0c798ed41

1 changed files with 1 additions and 1 deletions

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arch/s390/boot/physmem_info.c

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