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Commit 11f3ed61 authored by Treehugger Robot's avatar Treehugger Robot Committed by Automerger Merge Worker
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Merge "[Bugfix]Fix userspace-reboot failure when backing_dev exists but zram... 

Merge "[Bugfix]Fix userspace-reboot failure when backing_dev exists but zram not swapped on" am: 23a50b38 am: bce0c15f

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1674154

Change-Id: I64dcfce0607d41ee4c859dafe040013dc62cf47e
parents b846cd64 bce0c15f

init/reboot.cpp

+15 −3
Original line number Diff line number Diff line
@@ -453,7 +453,19 @@ static UmountStat TryUmountAndFsck(unsigned int cmd, bool run_fsck, 
#define ZRAM_DEVICE       "/dev/block/zram0"

#define ZRAM_RESET        "/sys/block/zram0/reset"

#define ZRAM_BACK_DEV     "/sys/block/zram0/backing_dev"

#define ZRAM_INITSTATE    "/sys/block/zram0/initstate"

static Result<void> KillZramBackingDevice() {

    std::string zram_initstate;

    if (!android::base::ReadFileToString(ZRAM_INITSTATE, &zram_initstate)) {

        return ErrnoError() << "Failed to read " << ZRAM_INITSTATE;

    }



    zram_initstate.erase(zram_initstate.length() - 1);

    if (zram_initstate == "0") {

        LOG(INFO) << "Zram has not been swapped on";

        return {};

    }



    if (access(ZRAM_BACK_DEV, F_OK) != 0 && errno == ENOENT) {

        LOG(INFO) << "No zram backing device configured";

        return {};