Cherry-picked upstream out-of-order emubd testing

More information upstream (f2a6f45, fc2aa33, 7873d81), but this adds
LFS_EMUBD_POWERLOS_OOO for testing out-of-order block devices that
require sync to be called for things to serialize. It's a simple
implementation, just reverts the first write since last sync on
powerloss, but gets the job done.

Cherry-picking these changes required reverting emubd's scratch buffer,
but carrying around an extra ~block_size of memory isn't a big deal
here.

runners/bench_runner.h

@@ -157,7 +157,8 @@ void bench_permutation(size_t i, uint32_t *buffer, size_t size);
 #define BENCH_BDCFG \
     .erase_value        = ERASE_VALUE,          \
     .erase_cycles       = ERASE_CYCLES,         \
-    .badblock_behavior  = BADBLOCK_BEHAVIOR,
+    .badblock_behavior  = BADBLOCK_BEHAVIOR,    \
+    .powerloss_behavior = POWERLOSS_BEHAVIOR,
 
 
 #endif

runners/test_runner.c

@@ -1379,7 +1379,6 @@ static void run_powerloss_linear(
         .power_cycles       = (TEST_PLS < powerloss->cycle_count)
                 ? TEST_PLS+1
                 : 0,
-        .powerloss_behavior = POWERLOSS_BEHAVIOR,
         .powerloss_cb       = powerloss_longjmp,
         .powerloss_data     = &powerloss_jmp,
         TEST_BDCFG
@@ -1457,7 +1456,6 @@ static void run_powerloss_log(
         .power_cycles       = (TEST_PLS < powerloss->cycle_count)
                 ? 1 << TEST_PLS
                 : 0,
-        .powerloss_behavior = POWERLOSS_BEHAVIOR,
         .powerloss_cb       = powerloss_longjmp,
         .powerloss_data     = &powerloss_jmp,
         TEST_BDCFG
@@ -1535,7 +1533,6 @@ static void run_powerloss_cycles(
         .power_cycles       = (TEST_PLS < powerloss->cycle_count)
                 ? powerloss->cycles[TEST_PLS]
                 : 0,
-        .powerloss_behavior = POWERLOSS_BEHAVIOR,
         .powerloss_cb       = powerloss_longjmp,
         .powerloss_data     = &powerloss_jmp,
         TEST_BDCFG
@@ -1708,7 +1705,6 @@ static void run_powerloss_exhaustive(
         .read_sleep         = test_read_sleep,
         .prog_sleep         = test_prog_sleep,
         .erase_sleep        = test_erase_sleep,
-        .powerloss_behavior = POWERLOSS_BEHAVIOR,
         .powerloss_cb       = powerloss_exhaustive_branch,
         .powerloss_data     = NULL,
         TEST_BDCFG

runners/test_runner.h

@@ -142,7 +142,8 @@ void test_permutation(size_t i, uint32_t *buffer, size_t size);
 #define TEST_BDCFG \
     .erase_value        = ERASE_VALUE,          \
     .erase_cycles       = ERASE_CYCLES,         \
-    .badblock_behavior  = BADBLOCK_BEHAVIOR,
+    .badblock_behavior  = BADBLOCK_BEHAVIOR,    \
+    .powerloss_behavior = POWERLOSS_BEHAVIOR,
 
 
 #endif