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posix: options: mlock: refine imply for MMU and DEMAND_PAGING #83648

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merged 1 commit into from
Jan 11, 2025
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posix: options: mlock: refine imply for MMU and DEMAND_PAGING #83648

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2 changes: 1 addition & 1 deletion lib/posix/options/Kconfig.mem
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ config POSIX_MEMLOCK

config POSIX_MEMLOCK_RANGE
bool "POSIX range memory locking"
imply MMU
imply MMU if (CPU_HAS_MMU && ARCH_HAS_DEMAND_PAGING)
imply DEMAND_PAGING
help
Select 'y' here and Zephyr will provide support for mlock() and munlock().
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22 changes: 16 additions & 6 deletions lib/posix/options/mlock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,18 +13,28 @@

int mlock(const void *addr, size_t len)
{
void *const _addr = (void *)addr;
if (IS_ENABLED(CONFIG_DEMAND_PAGING)) {
void *const _addr = (void *)addr;

k_mem_pin(_addr, len);
k_mem_pin(_addr, len);

return 0;
return 0;
}

errno = ENOTSUP;
return -1;
}

int munlock(const void *addr, size_t len)
{
void *const _addr = (void *)addr;
if (IS_ENABLED(CONFIG_DEMAND_PAGING)) {
void *const _addr = (void *)addr;

k_mem_unpin(_addr, len);

k_mem_unpin(_addr, len);
return 0;
}

return 0;
errno = ENOTSUP;
return -1;
}
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