MIPS: Remove function size check in get_frame_info()
PATCH 1/1 MIPS: Remove function size check in get_frame_info()
Patch (b6c7a324df37b "MIPS: Fix get_frame_info() handling of microMIPS function size.") introduces additional function size check for microMIPS by only checking insn between ip and ip + func_size. However, func_size in get_frame_info() is always 0 if KALLSYMS is not enabled. This causes get_frame_info() to return immediately without calculating correct frame_size, which in turn causes "Can't analyze schedule() prologue" warning messages at boot time.
This patch removes func_size check, and let the frame_size check run up to 128 insns for both MIPS and microMIPS.
Signed-off-by Jun-Ru Chang <[email protected]>
Signed-off-by Tony Wu <[email protected]>
Fixes b6c7a324df37b ("MIPS: Fix get_frame_info() handling of microMIPS function size.")
--- arch/mips/kernel/process.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
arch/mips/kernel/process.c +3 -4
@@ -371,7 +371,7 @@ static inline int is_sp_move_ins(union mips_instruction *ip, int *frame_size)static int get_frame_info (struct mips_frame_info *info) {bool is_mmips =IS_ENABLED (CONFIG_CPU_MICROMIPS ); -union mips_instruction insn, *ip, *ip_end; +union mips_instruction insn, *ip;const unsigned int max_insns =128 ;unsigned int last_insn_size =0 ;unsigned int i;
@@ -384,10 +384,9 @@ static int get_frame_info(struct mips_frame_info *info)if (!ip) goto err; - ip_end = (void *)ip + info->func_size; - -for (i =0 ; i < max_insns && ip < ip_end; i++) { +for (i =0 ; i < max_insns; i++) { ip = (void *)ip + last_insn_size; +if (is_mmips &&mm_insn_16bit (ip->halfword[0 ])) { insn.word = ip->halfword[0 ] <<16 ; last_insn_size =2 ;
Signature · 1 line
2.20.1