From 9d0c4dfedd96ee54fc075b16d02f82499c8cc3a6 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Tue, 1 Apr 2014 23:49:03 -0500 Subject: [PATCH] of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring Tested-by: Michal Simek Tested-by: Grant Likely Tested-by: Stephen Chivers --- arch/arc/kernel/devtree.c | 2 +- arch/arm/kernel/devtree.c | 2 +- arch/arm/mach-exynos/exynos.c | 2 +- arch/arm/mach-vexpress/platsmp.c | 2 +- arch/arm/plat-samsung/s5p-dev-mfc.c | 4 +-- arch/microblaze/kernel/prom.c | 8 +++--- arch/powerpc/kernel/epapr_paravirt.c | 2 +- arch/powerpc/kernel/fadump.c | 4 +-- arch/powerpc/kernel/prom.c | 24 ++++++++-------- arch/powerpc/kernel/rtas.c | 2 +- arch/powerpc/mm/hash_utils_64.c | 22 +++++++-------- arch/powerpc/platforms/52xx/efika.c | 4 +-- arch/powerpc/platforms/chrp/setup.c | 4 +-- arch/powerpc/platforms/powernv/opal.c | 12 ++++---- arch/powerpc/platforms/pseries/setup.c | 4 +-- arch/xtensa/kernel/setup.c | 2 +- drivers/of/fdt.c | 39 +++++++++++++------------- drivers/of/of_reserved_mem.c | 4 +-- include/linux/of_fdt.h | 8 +++--- 19 files changed, 77 insertions(+), 74 deletions(-) diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c index b6dc4e21fd32..0b3ef4025d89 100644 --- a/arch/arc/kernel/devtree.c +++ b/arch/arc/kernel/devtree.c @@ -42,7 +42,7 @@ const struct machine_desc * __init setup_machine_fdt(void *dt) const struct machine_desc *mdesc; unsigned long dt_root; void *clk; - unsigned long len; + int len; if (!early_init_dt_scan(dt)) return NULL; diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c index dff9cc0e9bd6..38f4711b4995 100644 --- a/arch/arm/kernel/devtree.c +++ b/arch/arm/kernel/devtree.c @@ -247,7 +247,7 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys) if (!mdesc) { const char *prop; - long size; + int size; unsigned long dt_root; early_print("\nError: unrecognized/unsupported " diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c index b32a907d021d..77293d39dfc9 100644 --- a/arch/arm/mach-exynos/exynos.c +++ b/arch/arm/mach-exynos/exynos.c @@ -250,7 +250,7 @@ static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname, { struct map_desc iodesc; __be32 *reg; - unsigned long len; + int len; if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") && !of_flat_dt_is_compatible(node, "samsung,exynos5440-clock")) diff --git a/arch/arm/mach-vexpress/platsmp.c b/arch/arm/mach-vexpress/platsmp.c index 993c9ae5dc5e..b4a5f0d8390d 100644 --- a/arch/arm/mach-vexpress/platsmp.c +++ b/arch/arm/mach-vexpress/platsmp.c @@ -53,7 +53,7 @@ static int __init vexpress_dt_find_scu(unsigned long node, { if (of_flat_dt_match(node, vexpress_dt_cortex_a9_match)) { phys_addr_t phys_addr; - __be32 *reg = of_get_flat_dt_prop(node, "reg", NULL); + const __be32 *reg = of_get_flat_dt_prop(node, "reg", NULL); if (WARN_ON(!reg)) return -EINVAL; diff --git a/arch/arm/plat-samsung/s5p-dev-mfc.c b/arch/arm/plat-samsung/s5p-dev-mfc.c index 98087b655df0..469b86260fe3 100644 --- a/arch/arm/plat-samsung/s5p-dev-mfc.c +++ b/arch/arm/plat-samsung/s5p-dev-mfc.c @@ -125,8 +125,8 @@ device_initcall(s5p_mfc_memory_init); int __init s5p_fdt_alloc_mfc_mem(unsigned long node, const char *uname, int depth, void *data) { - __be32 *prop; - unsigned long len; + const __be32 *prop; + int len; struct s5p_mfc_dt_meminfo mfc_mem; if (!data) diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index abdfb10e7eca..c76630603058 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -43,13 +43,13 @@ #include #ifdef CONFIG_EARLY_PRINTK -static char *stdout; +static const char *stdout; static int __init early_init_dt_scan_chosen_serial(unsigned long node, const char *uname, int depth, void *data) { - unsigned long l; - char *p; + int l; + const char *p; pr_debug("%s: depth: %d, uname: %s\n", __func__, depth, uname); @@ -80,7 +80,7 @@ static int __init early_init_dt_scan_chosen_serial(unsigned long node, (strncmp(p, "xlnx,opb-uartlite", 17) == 0) || (strncmp(p, "xlnx,axi-uartlite", 17) == 0) || (strncmp(p, "xlnx,mdm", 8) == 0)) { - unsigned int *addrp; + const unsigned int *addrp; *(u32 *)data = UARTLITE; diff --git a/arch/powerpc/kernel/epapr_paravirt.c b/arch/powerpc/kernel/epapr_paravirt.c index 7898be90f2dc..d64e92b22dd8 100644 --- a/arch/powerpc/kernel/epapr_paravirt.c +++ b/arch/powerpc/kernel/epapr_paravirt.c @@ -36,7 +36,7 @@ static int __init early_init_dt_scan_epapr(unsigned long node, int depth, void *data) { const u32 *insts; - unsigned long len; + int len; int i; insts = of_get_flat_dt_prop(node, "hcall-instructions", &len); diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c index 2230fd0ca3e4..7213d930918d 100644 --- a/arch/powerpc/kernel/fadump.c +++ b/arch/powerpc/kernel/fadump.c @@ -55,9 +55,9 @@ int crash_mem_ranges; int __init early_init_dt_scan_fw_dump(unsigned long node, const char *uname, int depth, void *data) { - __be32 *sections; + const __be32 *sections; int i, num_sections; - unsigned long size; + int size; const int *token; if (depth != 1 || strcmp(uname, "rtas") != 0) diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index d65754935652..483273e5c3e0 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -163,7 +163,7 @@ static struct ibm_pa_feature { {CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0}, }; -static void __init scan_features(unsigned long node, unsigned char *ftrs, +static void __init scan_features(unsigned long node, const unsigned char *ftrs, unsigned long tablelen, struct ibm_pa_feature *fp, unsigned long ft_size) @@ -202,8 +202,8 @@ static void __init scan_features(unsigned long node, unsigned char *ftrs, static void __init check_cpu_pa_features(unsigned long node) { - unsigned char *pa_ftrs; - unsigned long tablelen; + const unsigned char *pa_ftrs; + int tablelen; pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen); if (pa_ftrs == NULL) @@ -216,7 +216,7 @@ static void __init check_cpu_pa_features(unsigned long node) #ifdef CONFIG_PPC_STD_MMU_64 static void __init check_cpu_slb_size(unsigned long node) { - __be32 *slb_size_ptr; + const __be32 *slb_size_ptr; slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL); if (slb_size_ptr != NULL) { @@ -257,7 +257,7 @@ static struct feature_property { static inline void identical_pvr_fixup(unsigned long node) { unsigned int pvr; - char *model = of_get_flat_dt_prop(node, "model", NULL); + const char *model = of_get_flat_dt_prop(node, "model", NULL); /* * Since 440GR(x)/440EP(x) processors have the same pvr, @@ -295,11 +295,11 @@ static int __init early_init_dt_scan_cpus(unsigned long node, const char *uname, int depth, void *data) { - char *type = of_get_flat_dt_prop(node, "device_type", NULL); + const char *type = of_get_flat_dt_prop(node, "device_type", NULL); const __be32 *prop; const __be32 *intserv; int i, nthreads; - unsigned long len; + int len; int found = -1; int found_thread = 0; @@ -392,7 +392,7 @@ static int __init early_init_dt_scan_cpus(unsigned long node, int __init early_init_dt_scan_chosen_ppc(unsigned long node, const char *uname, int depth, void *data) { - unsigned long *lprop; /* All these set by kernel, so no need to convert endian */ + const unsigned long *lprop; /* All these set by kernel, so no need to convert endian */ /* Use common scan routine to determine if this is the chosen node */ if (early_init_dt_scan_chosen(node, uname, depth, data) == 0) @@ -443,8 +443,9 @@ int __init early_init_dt_scan_chosen_ppc(unsigned long node, const char *uname, */ static int __init early_init_dt_scan_drconf_memory(unsigned long node) { - __be32 *dm, *ls, *usm; - unsigned long l, n, flags; + const __be32 *dm, *ls, *usm; + int l; + unsigned long n, flags; u64 base, size, memblock_size; unsigned int is_kexec_kdump = 0, rngs; @@ -564,7 +565,8 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) static void __init early_reserve_mem_dt(void) { - unsigned long i, len, dt_root; + unsigned long i, dt_root; + int len; const __be32 *prop; early_init_fdt_scan_reserved_mem(); diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 8cd5ed049b5d..8b4c857c1421 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -1142,7 +1142,7 @@ void __init rtas_initialize(void) int __init early_init_dt_scan_rtas(unsigned long node, const char *uname, int depth, void *data) { - u32 *basep, *entryp, *sizep; + const u32 *basep, *entryp, *sizep; if (depth != 1 || strcmp(uname, "rtas") != 0) return 0; diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index d766d6ee33fe..59cc19a23a7a 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -265,9 +265,9 @@ static int __init htab_dt_scan_seg_sizes(unsigned long node, const char *uname, int depth, void *data) { - char *type = of_get_flat_dt_prop(node, "device_type", NULL); - __be32 *prop; - unsigned long size = 0; + const char *type = of_get_flat_dt_prop(node, "device_type", NULL); + const __be32 *prop; + int size = 0; /* We are scanning "cpu" nodes only */ if (type == NULL || strcmp(type, "cpu") != 0) @@ -320,9 +320,9 @@ static int __init htab_dt_scan_page_sizes(unsigned long node, const char *uname, int depth, void *data) { - char *type = of_get_flat_dt_prop(node, "device_type", NULL); - __be32 *prop; - unsigned long size = 0; + const char *type = of_get_flat_dt_prop(node, "device_type", NULL); + const __be32 *prop; + int size = 0; /* We are scanning "cpu" nodes only */ if (type == NULL || strcmp(type, "cpu") != 0) @@ -402,9 +402,9 @@ static int __init htab_dt_scan_page_sizes(unsigned long node, static int __init htab_dt_scan_hugepage_blocks(unsigned long node, const char *uname, int depth, void *data) { - char *type = of_get_flat_dt_prop(node, "device_type", NULL); - __be64 *addr_prop; - __be32 *page_count_prop; + const char *type = of_get_flat_dt_prop(node, "device_type", NULL); + const __be64 *addr_prop; + const __be32 *page_count_prop; unsigned int expected_pages; long unsigned int phys_addr; long unsigned int block_size; @@ -546,8 +546,8 @@ static int __init htab_dt_scan_pftsize(unsigned long node, const char *uname, int depth, void *data) { - char *type = of_get_flat_dt_prop(node, "device_type", NULL); - __be32 *prop; + const char *type = of_get_flat_dt_prop(node, "device_type", NULL); + const __be32 *prop; /* We are scanning "cpu" nodes only */ if (type == NULL || strcmp(type, "cpu") != 0) diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c index 18c104820198..6e19b0ad5d26 100644 --- a/arch/powerpc/platforms/52xx/efika.c +++ b/arch/powerpc/platforms/52xx/efika.c @@ -199,8 +199,8 @@ static void __init efika_setup_arch(void) static int __init efika_probe(void) { - char *model = of_get_flat_dt_prop(of_get_flat_dt_root(), - "model", NULL); + const char *model = of_get_flat_dt_prop(of_get_flat_dt_root(), + "model", NULL); if (model == NULL) return 0; diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c index c665d7de6c99..7044fd36197b 100644 --- a/arch/powerpc/platforms/chrp/setup.c +++ b/arch/powerpc/platforms/chrp/setup.c @@ -574,8 +574,8 @@ chrp_init2(void) static int __init chrp_probe(void) { - char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(), - "device_type", NULL); + const char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(), + "device_type", NULL); if (dtype == NULL) return 0; if (strcmp(dtype, "chrp")) diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 49d2f00019e5..c1329846bfa3 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -61,7 +61,7 @@ int __init early_init_dt_scan_opal(unsigned long node, const char *uname, int depth, void *data) { const void *basep, *entryp, *sizep; - unsigned long basesz, entrysz, runtimesz; + int basesz, entrysz, runtimesz; if (depth != 1 || strcmp(uname, "ibm,opal") != 0) return 0; @@ -77,11 +77,11 @@ int __init early_init_dt_scan_opal(unsigned long node, opal.entry = of_read_number(entryp, entrysz/4); opal.size = of_read_number(sizep, runtimesz/4); - pr_debug("OPAL Base = 0x%llx (basep=%p basesz=%ld)\n", + pr_debug("OPAL Base = 0x%llx (basep=%p basesz=%d)\n", opal.base, basep, basesz); - pr_debug("OPAL Entry = 0x%llx (entryp=%p basesz=%ld)\n", + pr_debug("OPAL Entry = 0x%llx (entryp=%p basesz=%d)\n", opal.entry, entryp, entrysz); - pr_debug("OPAL Entry = 0x%llx (sizep=%p runtimesz=%ld)\n", + pr_debug("OPAL Entry = 0x%llx (sizep=%p runtimesz=%d)\n", opal.size, sizep, runtimesz); powerpc_firmware_features |= FW_FEATURE_OPAL; @@ -102,7 +102,7 @@ int __init early_init_dt_scan_opal(unsigned long node, int __init early_init_dt_scan_recoverable_ranges(unsigned long node, const char *uname, int depth, void *data) { - unsigned long i, psize, size; + int i, psize, size; const __be32 *prop; if (depth != 1 || strcmp(uname, "ibm,opal") != 0) @@ -359,7 +359,7 @@ int opal_get_chars(uint32_t vtermno, char *buf, int count) if ((be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_INPUT) == 0) return 0; len = cpu_to_be64(count); - rc = opal_console_read(vtermno, &len, buf); + rc = opal_console_read(vtermno, &len, buf); if (rc == OPAL_SUCCESS) return be64_to_cpu(len); return 0; diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 2db8cc691bf4..099d2df976a2 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -665,7 +665,7 @@ static int __init pseries_probe_fw_features(unsigned long node, void *data) { const char *prop; - unsigned long len; + int len; static int hypertas_found; static int vec5_found; @@ -698,7 +698,7 @@ static int __init pseries_probe_fw_features(unsigned long node, static int __init pSeries_probe(void) { unsigned long root = of_get_flat_dt_root(); - char *dtype = of_get_flat_dt_prop(root, "device_type", NULL); + const char *dtype = of_get_flat_dt_prop(root, "device_type", NULL); if (dtype == NULL) return 0; diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index 89986e55d594..1991a3d0b2f8 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -220,7 +220,7 @@ static int __init xtensa_dt_io_area(unsigned long node, const char *uname, int depth, void *data) { const __be32 *ranges; - unsigned long len; + int len; if (depth > 1) return 0; diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 9c8535291909..1d1582bb81fb 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -35,7 +35,7 @@ char *of_fdt_get_string(struct boot_param_header *blob, u32 offset) */ void *of_fdt_get_property(struct boot_param_header *blob, unsigned long node, const char *name, - unsigned long *size) + int *size) { unsigned long p = node; @@ -85,7 +85,8 @@ int of_fdt_is_compatible(struct boot_param_header *blob, unsigned long node, const char *compat) { const char *cp; - unsigned long cplen, l, score = 0; + int cplen; + unsigned long l, score = 0; cp = of_fdt_get_property(blob, node, "compatible", &cplen); if (cp == NULL) @@ -444,8 +445,8 @@ static int __init __reserved_mem_reserve_reg(unsigned long node, { int t_len = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32); phys_addr_t base, size; - unsigned long len; - __be32 *prop; + int len; + const __be32 *prop; int nomap, first = 1; prop = of_get_flat_dt_prop(node, "reg", &len); @@ -488,7 +489,7 @@ static int __init __reserved_mem_reserve_reg(unsigned long node, */ static int __init __reserved_mem_check_root(unsigned long node) { - __be32 *prop; + const __be32 *prop; prop = of_get_flat_dt_prop(node, "#size-cells", NULL); if (!prop || be32_to_cpup(prop) != dt_root_size_cells) @@ -638,8 +639,8 @@ unsigned long __init of_get_flat_dt_root(void) * This function can be used within scan_flattened_dt callback to get * access to properties */ -void *__init of_get_flat_dt_prop(unsigned long node, const char *name, - unsigned long *size) +const void *__init of_get_flat_dt_prop(unsigned long node, const char *name, + int *size) { return of_fdt_get_property(initial_boot_params, node, name, size); } @@ -710,7 +711,7 @@ const void * __init of_flat_dt_match_machine(const void *default_match, } if (!best_data) { const char *prop; - long size; + int size; pr_err("\n unrecognized device tree list:\n[ "); @@ -739,8 +740,8 @@ const void * __init of_flat_dt_match_machine(const void *default_match, static void __init early_init_dt_check_for_initrd(unsigned long node) { u64 start, end; - unsigned long len; - __be32 *prop; + int len; + const __be32 *prop; pr_debug("Looking for initrd properties... "); @@ -773,7 +774,7 @@ static inline void early_init_dt_check_for_initrd(unsigned long node) int __init early_init_dt_scan_root(unsigned long node, const char *uname, int depth, void *data) { - __be32 *prop; + const __be32 *prop; if (depth != 0) return 0; @@ -795,9 +796,9 @@ int __init early_init_dt_scan_root(unsigned long node, const char *uname, return 1; } -u64 __init dt_mem_next_cell(int s, __be32 **cellp) +u64 __init dt_mem_next_cell(int s, const __be32 **cellp) { - __be32 *p = *cellp; + const __be32 *p = *cellp; *cellp = p + s; return of_read_number(p, s); @@ -809,9 +810,9 @@ u64 __init dt_mem_next_cell(int s, __be32 **cellp) int __init early_init_dt_scan_memory(unsigned long node, const char *uname, int depth, void *data) { - char *type = of_get_flat_dt_prop(node, "device_type", NULL); - __be32 *reg, *endp; - unsigned long l; + const char *type = of_get_flat_dt_prop(node, "device_type", NULL); + const __be32 *reg, *endp; + int l; /* We are scanning "memory" nodes only */ if (type == NULL) { @@ -832,7 +833,7 @@ int __init early_init_dt_scan_memory(unsigned long node, const char *uname, endp = reg + (l / sizeof(__be32)); - pr_debug("memory scan node %s, reg size %ld, data: %x %x %x %x,\n", + pr_debug("memory scan node %s, reg size %d, data: %x %x %x %x,\n", uname, l, reg[0], reg[1], reg[2], reg[3]); while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) { @@ -855,8 +856,8 @@ int __init early_init_dt_scan_memory(unsigned long node, const char *uname, int __init early_init_dt_scan_chosen(unsigned long node, const char *uname, int depth, void *data) { - unsigned long l; - char *p; + int l; + const char *p; pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname); diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index daaaf935911d..e420eb52e5c9 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -95,8 +95,8 @@ static int __init __reserved_mem_alloc_size(unsigned long node, int t_len = (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32); phys_addr_t start = 0, end = 0; phys_addr_t base = 0, align = 0, size; - unsigned long len; - __be32 *prop; + int len; + const __be32 *prop; int nomap; int ret; diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h index 991ec74b4e11..b36a50d6af37 100644 --- a/include/linux/of_fdt.h +++ b/include/linux/of_fdt.h @@ -66,7 +66,7 @@ extern char *of_fdt_get_string(struct boot_param_header *blob, u32 offset); extern void *of_fdt_get_property(struct boot_param_header *blob, unsigned long node, const char *name, - unsigned long *size); + int *size); extern int of_fdt_is_compatible(struct boot_param_header *blob, unsigned long node, const char *compat); @@ -88,8 +88,8 @@ extern char *find_flat_dt_string(u32 offset); extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname, int depth, void *data), void *data); -extern void *of_get_flat_dt_prop(unsigned long node, const char *name, - unsigned long *size); +extern const void *of_get_flat_dt_prop(unsigned long node, const char *name, + int *size); extern int of_flat_dt_is_compatible(unsigned long node, const char *name); extern int of_flat_dt_match(unsigned long node, const char *const *matches); extern unsigned long of_get_flat_dt_root(void); @@ -103,7 +103,7 @@ extern void early_init_dt_add_memory_arch(u64 base, u64 size); extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size, bool no_map); extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align); -extern u64 dt_mem_next_cell(int s, __be32 **cellp); +extern u64 dt_mem_next_cell(int s, const __be32 **cellp); /* Early flat tree scan hooks */ extern int early_init_dt_scan_root(unsigned long node, const char *uname,