drivers: soc: acpm: Prevent optimization of 'acpm_initdata'
More optimization issues when compiling with Clang. Panics happen when the device goes into standby with the following report.
<6>[ 1470.900859] [0: Binder:4157_2: 8735] EXYNOS-PM:: MIF down. cur_count: 5, acc_count: 5
<6>[ 1470.900859] [0: Binder:4157_2: 8735] EXYNOS-PM:: MIF_UP history:
<6>[ 1470.900859] [0: Binder:4157_2: 8735] EXYNOS-PM: mifuser: 0x540000, time: 5:35:40, latency: 1955[usec]
<6>[ 1470.900859] [0: Binder:4157_2: 8735] EXYNOS-PM: mifuser: 0x400000, time: 5:35:40, latency: 1956[usec]
<6>[ 1470.900859] [0: Binder:4157_2: 8735] EXYNOS-PM: mifuser: 0x100000, time: 5:35:41, latency: 1954[usec]
<6>[ 1470.900859] [0: Binder:4157_2: 8735] EXYNOS-PM: mifuser: 0x400000, time: 5:35:41, latency: 1955[usec]
<6>[ 1470.900859] [0: Binder:4157_2: 8735] EXYNOS-PM: mifuser: 0x100000, time: 5:35:41, latency: 1955[usec]
<0>[ 1470.900859] [0: Binder:4157_2: 8735] Unable to handle kernel paging request at virtual address ffffff800b346f9c
<2>[ 1470.900859] [0: Binder:4157_2: 8735] sec_debug_set_extra_info_fault = KERN / 0xffffff800b346f9c
<1>[ 1470.900859] [0: Binder:4157_2: 8735] Mem abort info:
<1>[ 1470.900859] [0: Binder:4157_2: 8735] Exception class = DABT (current EL), IL = 32 bits
<1>[ 1470.900859] [0: Binder:4157_2: 8735] SET = 0, FnV = 0
<1>[ 1470.900859] [0: Binder:4157_2: 8735] EA = 0, S1PTW = 0
<1>[ 1470.900859] [0: Binder:4157_2: 8735] Data abort info:
<1>[ 1470.900859] [0: Binder:4157_2: 8735] ISV = 0, ISS = 0x00000061
<1>[ 1470.900859] [0: Binder:4157_2: 8735] CM = 0, WnR = 1
<1>[ 1470.900859] [0: Binder:4157_2: 8735] swapper pgtable: 4k pages, 39-bit VAs, pgd = ffffff800a66a000
<1>[ 1470.900859] [0: Binder:4157_2: 8735] [ffffff800b346f9c] *pgd=000000097cdfe003, *pud=000000097cdfe003, *pmd=00000009740b7003, *pte=00e800000203f707
<0>[ 1470.900859] [0: Binder:4157_2: 8735] Internal error: Oops: 96000061 [#1] PREEMPT SMP
<4>[ 1470.900859] [0: Binder:4157_2: 8735] Modules linked in:
<0>[ 1470.900859] [0: Binder:4157_2: 8735] Process Binder:4157_2 (pid: 8735, stack limit = 0xffffff8039708000)
<0>[ 1470.900859] [0: Binder:4157_2: 8735] debug-snapshot: core register saved(CPU:0)
<0>[ 1470.900859] [0: Binder:4157_2: 8735] L2ECTLR_EL1: 0000000000000007
<0>[ 1470.900859] [0: Binder:4157_2: 8735] L2ECTLR_EL1 valid_bit(30) is NOT set (0x0)
<0>[ 1470.900859] [0: Binder:4157_2: 8735] CPUMERRSR: 0000000008000001, L2MERRSR: 0000000010200c00
<0>[ 1470.900859] [0: Binder:4157_2: 8735] CPUMERRSR valid_bit(31) is NOT set (0x0)
<0>[ 1470.900859] [0: Binder:4157_2: 8735] L2MERRSR valid_bit(31) is NOT set (0x0)
<0>[ 1470.900859] [0: Binder:4157_2: 8735] debug-snapshot: context saved(CPU:0)
<6>[ 1470.900859] [0: Binder:4157_2: 8735] debug-snapshot: item - log_kevents is disabled
<6>[ 1470.900859] [0: Binder:4157_2: 8735] TIF_FOREIGN_FPSTATE: 1, FP/SIMD depth 0, cpu: 0
<4>[ 1470.900859] [0: Binder:4157_2: 8735] CPU: 0 PID: 8735 Comm: Binder:4157_2 Not tainted 4.14.113 - Fresh Core-user #1
<4>[ 1470.900859] [0: Binder:4157_2: 8735] Hardware name: Samsung A50 LTN OPEN rev04 board based on Exynos9610 (DT)
<4>[ 1470.900859] [0: Binder:4157_2: 8735] task: ffffffc0466d6000 task.stack: ffffff8039708000
<4>[ 1470.900859] [0: Binder:4157_2: 8735] PC is at acpm_get_inform+0x90/0x100
<4>[ 1470.900859] [0: Binder:4157_2: 8735] LR is at acpm_get_inform+0x7c/0x100
<4>[ 1470.900859] [0: Binder:4157_2: 8735] pc : [<ffffff8008505cd4>] lr : [<ffffff8008505cc0>] pstate: 604001c5
<4>[ 1470.900859] [0: Binder:4157_2: 8735] sp : ffffff803970bac0
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x29: ffffff803970bac0 x28: ffffffc0466d6000
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x27: ffffff8008e44b64 x26: ffffff8008e44b3e
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x25: ffffff8009e5f210 x24: 0000000010624dd3
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x23: 0000000000000029 x22: 0000000000000018
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x21: ffffff8009e2c000 x20: ffffff8008ef6785
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x19: ffffff8008ef674c x18: 00000000000000a0
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x17: ffffff8009b3023c x16: 0000000000000001
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x15: ffffff8008c8a964 x14: 202c303030303031
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x13: 7830203a72657375 x12: 0000000000000000
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x11: 0000000000000000 x10: ffffffffffffffff
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x9 : ffffff800b346f00 x8 : ffffff800b346f00
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x7 : 203a79636e657461 x6 : ffffff80f615273c
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x5 : 000000000000221f x4 : 000000000000000c
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x3 : 000000000000000a x2 : 0000000000000000
<4>[ 1470.900859] [0: Binder:4157_2: 8735] x1 : 00000000000001c0 x0 : 0000000000000041
Similar solution as d855e6f. Make the structs volatile to prevent optimization.
Signed-off-by: John Vincent <git@tensevntysevn.cf>
Signed-off-by: Samuel Pascua <sgpascua@ngcp.ph>
04ff6cbc91