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authorLinus Torvalds <torvalds@linux-foundation.org>2019-01-01 15:38:14 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-01 15:38:14 -0800
commitfcf010449ebe1db0cb68b2c6410972a782f2bd14 (patch)
tree56707e5d99776025aa5ffaf27cd97ca924622d36 /arch/hexagon
parentMerge tag 'for-linus' of git://github.com/openrisc/linux (diff)
parentkgdb/treewide: constify struct kgdb_arch arch_kgdb_ops (diff)
downloadlinux-dev-fcf010449ebe1db0cb68b2c6410972a782f2bd14.tar.xz
linux-dev-fcf010449ebe1db0cb68b2c6410972a782f2bd14.zip
Merge tag 'kgdb-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux
Pull kgdb updates from Daniel Thompson: "Mostly clean ups although while Doug's was chasing down a odd lockdep warning he also did some work to improved debugger resilience when some CPUs fail to respond to the round up request. The main changes are: - Fixing a lockdep warning on architectures that cannot use an NMI for the round up plus related changes to make CPU round up and all CPU backtrace more resilient. - Constify the arch ops tables - A couple of other small clean ups Two of the three patchsets here include changes that spill over into arch/. Changes in the arch space are relatively narrow in scope (and directly related to kgdb). Didn't get comprehensive acks but all impacted maintainers were Cc:ed in good time" * tag 'kgdb-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux: kgdb/treewide: constify struct kgdb_arch arch_kgdb_ops mips/kgdb: prepare arch_kgdb_ops for constness kdb: use bool for binary state indicators kdb: Don't back trace on a cpu that didn't round up kgdb: Don't round up a CPU that failed rounding up before kgdb: Fix kgdb_roundup_cpus() for arches who used smp_call_function() kgdb: Remove irq flags from roundup
Diffstat (limited to 'arch/hexagon')
-rw-r--r--arch/hexagon/kernel/kgdb.c34
1 files changed, 1 insertions, 33 deletions
diff --git a/arch/hexagon/kernel/kgdb.c b/arch/hexagon/kernel/kgdb.c
index 16c24b22d0b2..3fabd3ff3bbd 100644
--- a/arch/hexagon/kernel/kgdb.c
+++ b/arch/hexagon/kernel/kgdb.c
@@ -83,7 +83,7 @@ struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = {
{ "syscall_nr", GDB_SIZEOF_REG, offsetof(struct pt_regs, syscall_nr)},
};
-struct kgdb_arch arch_kgdb_ops = {
+const struct kgdb_arch arch_kgdb_ops = {
/* trap0(#0xDB) 0x0cdb0054 */
.gdb_bpt_instr = {0x54, 0x00, 0xdb, 0x0c},
};
@@ -115,38 +115,6 @@ void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc)
instruction_pointer(regs) = pc;
}
-#ifdef CONFIG_SMP
-
-/**
- * kgdb_roundup_cpus - Get other CPUs into a holding pattern
- * @flags: Current IRQ state
- *
- * On SMP systems, we need to get the attention of the other CPUs
- * and get them be in a known state. This should do what is needed
- * to get the other CPUs to call kgdb_wait(). Note that on some arches,
- * the NMI approach is not used for rounding up all the CPUs. For example,
- * in case of MIPS, smp_call_function() is used to roundup CPUs. In
- * this case, we have to make sure that interrupts are enabled before
- * calling smp_call_function(). The argument to this function is
- * the flags that will be used when restoring the interrupts. There is
- * local_irq_save() call before kgdb_roundup_cpus().
- *
- * On non-SMP systems, this is not called.
- */
-
-static void hexagon_kgdb_nmi_hook(void *ignored)
-{
- kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
-}
-
-void kgdb_roundup_cpus(unsigned long flags)
-{
- local_irq_enable();
- smp_call_function(hexagon_kgdb_nmi_hook, NULL, 0);
- local_irq_disable();
-}
-#endif
-
/* Not yet working */
void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs,