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of: reserved_mem: clarify fdt_scan_reserved_mem*() functions

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Rename fdt_scan_reserved_mem_reg_nodes() to fdt_scan_reserved_mem_late()
to clearly show how it differs from fdt_scan_reserved_mem() and update
description of both functions.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://patch.msgid.link/20260325090023.3175348-7-m.szyprowski@samsung.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Marek Szyprowski
2026-03-25 10:00:22 +01:00
committed by Rob Herring (Arm)
parent 427864f793
commit bf66171579
3 changed files with 17 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/of/fdt.c
View File

@@ -1274,7 +1274,7 @@ void __init unflatten_device_tree(void)
void *fdt = initial_boot_params;
/* Save the statically-placed regions in the reserved_mem array */
fdt_scan_reserved_mem_reg_nodes();
fdt_scan_reserved_mem_late();
/* Populate an empty root node when bootloader doesn't provide one */
if (!fdt) {

2
drivers/of/of_private.h
View File

@@ -186,7 +186,7 @@ static inline struct device_node *__of_get_dma_parent(const struct device_node *
#endif
int fdt_scan_reserved_mem(void);
void __init fdt_scan_reserved_mem_reg_nodes(void);
void __init fdt_scan_reserved_mem_late(void);
bool of_fdt_device_is_available(const void *blob, unsigned long node);

24
drivers/of/of_reserved_mem.c
View File

@@ -265,16 +265,15 @@ static void __init __rmem_check_for_overlap(void)
}
/**
* fdt_scan_reserved_mem_reg_nodes() - Store info for the "reg" defined
* reserved memory regions.
* fdt_scan_reserved_mem_late() - Scan FDT and initialize remaining reserved
* memory regions.
*
* This function is used to scan through the DT and store the
* information for the reserved memory regions that are defined using
* the "reg" property. The region node number, name, base address, and
* size are all stored in the reserved_mem array by calling the
* fdt_reserved_mem_save_node() function.
* This function is used to scan again through the DT and initialize the
* "static" reserved memory regions, that are defined using the "reg"
* property. Each such region is then initialized with its specific init
* function and stored in the global reserved_mem array.
*/
void __init fdt_scan_reserved_mem_reg_nodes(void)
void __init fdt_scan_reserved_mem_late(void)
{
const void *fdt = initial_boot_params;
phys_addr_t base, size;
@@ -328,7 +327,14 @@ void __init fdt_scan_reserved_mem_reg_nodes(void)
static int __init __reserved_mem_alloc_size(unsigned long node, const char *uname);
/*
* fdt_scan_reserved_mem() - scan a single FDT node for reserved memory
* fdt_scan_reserved_mem() - reserve and allocate memory occupied by
* reserved memory regions.
*
* This function is used to scan through the FDT and mark memory occupied
* by all static (defined by the "reg" property) reserved memory regions.
* Then memory for all dynamic regions (defined by size & alignment) is
* allocated, a region specific init function is called and region information
* is stored in the reserved_mem array.
*/
int __init fdt_scan_reserved_mem(void)
{