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lmkd: Fixed data overflow on ARM 

Both pgscan_kwsapd and pgscan_direct are defined as unsigned long,
the overflow issues occur on ARM kernel space. Just check whether
their values changed.

Signed-off-by: Yuming Han <yuming.han@unisoc.com>
Change-Id: I73b27855ede9ca729208775e982660bae967ab92
This commit is contained in:
Yuming Han 2022-06-29 11:36:05 +08:00
parent caebcddf9f
commit 79f58c012d
1 changed files with 2 additions and 2 deletions
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4
lmkd.cpp
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@ -2651,11 +2651,11 @@ static void mp_event_psi(int data, uint32_t events, struct polling_params *poll_
} }
/* Identify reclaim state */ /* Identify reclaim state */
if (vs.field.pgscan_direct > init_pgscan_direct) { if (vs.field.pgscan_direct != init_pgscan_direct) {
init_pgscan_direct = vs.field.pgscan_direct; init_pgscan_direct = vs.field.pgscan_direct;
init_pgscan_kswapd = vs.field.pgscan_kswapd; init_pgscan_kswapd = vs.field.pgscan_kswapd;
reclaim = DIRECT_RECLAIM; reclaim = DIRECT_RECLAIM;
} else if (vs.field.pgscan_kswapd > init_pgscan_kswapd) { } else if (vs.field.pgscan_kswapd != init_pgscan_kswapd) {
init_pgscan_kswapd = vs.field.pgscan_kswapd; init_pgscan_kswapd = vs.field.pgscan_kswapd;
reclaim = KSWAPD_RECLAIM; reclaim = KSWAPD_RECLAIM;
} else if (workingset_refault_file == prev_workingset_refault) { } else if (workingset_refault_file == prev_workingset_refault) {