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8389588: [s390x] Zero build is broken after JDK-8388561

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Vladimir Petko 2026-08-03 10:35:33 +12:00
parent 5b2d6991a1
commit 3b3ec9ad14
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2 changed files with 7 additions and 6 deletions
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6
src/hotspot/os_cpu/linux_s390/os_linux_s390.cpp
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@ -478,9 +478,3 @@ int os::extra_bang_size_in_bytes() {
void os::setup_fpu() {}
uintptr_t os::vm_page_table_expansion_point() {
// On s390x, page table will dynamically expand based on user demand
// (eg mmap probing with high addresses). First expansion happens
// at 2^42 (4TB).
return nth_bit<uintptr_t>(42);
}

7
src/hotspot/share/runtime/os.cpp
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@ -1999,6 +1999,13 @@ static void shuffle_fisher_yates(T* arr, unsigned num, FastRandom& frand) {
uintptr_t os::vm_page_table_expansion_point() {
return align_down(UINTPTR_MAX, os::vm_allocation_granularity());
}
#else
uintptr_t os::vm_page_table_expansion_point() {
// On s390x, page table will dynamically expand based on user demand
// (eg mmap probing with high addresses). First expansion happens
// at 2^42 (4TB).
return nth_bit<uintptr_t>(42);
}
#endif
// Helper for os::attempt_reserve_memory_between