FYI, cxl.git vs acpi.git conflict entering -next for v6.8

[Dan Williams <dan.j.williams@xxxxxxxxx>]

Hey Stephen,

Just a heads up that you will see a conflict with current ACPI content
with the next pull of cxl.git/next tree.

Here are the commits in -next that conflict:

f47507988145 thermal: ACPI: Move the ACPI thermal library to drivers/acpi/
4b3805daaacb ACPI: tables: Correct and clean up the logic of acpi_parse_entries_array()

My proposed resolution below, and this branch has otherwise got a build
success notification from 0day.


commit 43d2e52a911396164845727e5d92f1d73c4ac195
Merge: 39676dfe5233 185c1a489f87
Author: Dan Williams <dan.j.williams@xxxxxxxxx>
Date:   Fri Dec 22 16:04:54 2023 -0800

    Merge branch 'for-6.8/cxl-cdat' into test

diff --cc include/linux/acpi.h
index 118a18b7ff84,8b0761c682f9..b7165e52b3c6
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@@ -424,13 -425,16 +425,23 @@@ extern int acpi_blacklisted(void)
  extern void acpi_osi_setup(char *str);
  extern bool acpi_osi_is_win8(void);
  
 +#ifdef CONFIG_ACPI_THERMAL_LIB
 +int thermal_acpi_active_trip_temp(struct acpi_device *adev, int id, int *ret_temp);
 +int thermal_acpi_passive_trip_temp(struct acpi_device *adev, int *ret_temp);
 +int thermal_acpi_hot_trip_temp(struct acpi_device *adev, int *ret_temp);
 +int thermal_acpi_critical_trip_temp(struct acpi_device *adev, int *ret_temp);
 +#endif
 +
+ #ifdef CONFIG_ACPI_HMAT
+ int acpi_get_genport_coordinates(u32 uid, struct access_coordinate *coord);
+ #else
+ static inline int acpi_get_genport_coordinates(u32 uid,
+ 					       struct access_coordinate *coord)
+ {
+ 	return -EOPNOTSUPP;
+ }
+ #endif
+ 
  #ifdef CONFIG_ACPI_NUMA
  int acpi_map_pxm_to_node(int pxm);
  int acpi_get_node(acpi_handle handle);
diff --cc lib/fw_table.c
index c49a09ee3853,1e5e0b2f7012..c3569d2ba503
--- a/lib/fw_table.c
+++ b/lib/fw_table.c
@@@ -85,9 -98,27 +98,22 @@@ acpi_get_subtable_type(char *id
  	return ACPI_SUBTABLE_COMMON;
  }
  
- static __init_or_acpilib int call_handler(struct acpi_subtable_proc *proc,
- 					  union acpi_subtable_headers *hdr,
- 					  unsigned long end)
+ static unsigned long __init_or_fwtbl_lib
+ acpi_table_get_length(enum acpi_subtable_type type,
+ 		      union fw_table_header *header)
+ {
+ 	if (type == CDAT_SUBTABLE) {
+ 		__le32 length = (__force __le32)header->cdat.length;
+ 
+ 		return le32_to_cpu(length);
+ 	}
+ 
+ 	return header->acpi.length;
+ }
+ 
 -static __init_or_fwtbl_lib bool has_handler(struct acpi_subtable_proc *proc)
 -{
 -	return proc->handler || proc->handler_arg;
 -}
 -
+ static __init_or_fwtbl_lib int call_handler(struct acpi_subtable_proc *proc,
+ 					    union acpi_subtable_headers *hdr,
+ 					    unsigned long end)
  {
  	if (proc->handler)
  		return proc->handler(hdr, end);
@@@ -127,10 -158,14 +153,13 @@@ acpi_parse_entries_array(char *id, unsi
  {
  	unsigned long table_end, subtable_len, entry_len;
  	struct acpi_subtable_entry entry;
+ 	enum acpi_subtable_type type;
  	int count = 0;
 -	int errs = 0;
  	int i;
  
- 	table_end = (unsigned long)table_header + table_header->length;
+ 	type = acpi_get_subtable_type(id);
+ 	table_end = (unsigned long)table_header +
+ 		    acpi_table_get_length(type, table_header);
  
  	/* Parse all entries looking for a match. */
  
@@@ -168,9 -209,31 +197,31 @@@
  	}
  
  	if (max_entries && count > max_entries) {
 -		pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n",
 -			id, proc->id, count);
 +		pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
 +			id, proc->id, count - max_entries, count);
  	}
  
 -	return errs ? -EINVAL : count;
 +	return count;
  }
+ 
+ int __init_or_fwtbl_lib
+ cdat_table_parse(enum acpi_cdat_type type,
+ 		 acpi_tbl_entry_handler_arg handler_arg,
+ 		 void *arg,
+ 		 struct acpi_table_cdat *table_header)
+ {
+ 	struct acpi_subtable_proc proc = {
+ 		.id		= type,
+ 		.handler_arg	= handler_arg,
+ 		.arg		= arg,
+ 	};
+ 
+ 	if (!table_header)
+ 		return -EINVAL;
+ 
+ 	return acpi_parse_entries_array(ACPI_SIG_CDAT,
+ 					sizeof(struct acpi_table_cdat),
+ 					(union fw_table_header *)table_header,
+ 					&proc, 1, 0);
+ }
+ EXPORT_SYMBOL_FWTBL_LIB(cdat_table_parse);