linux/arch/powerpc/sysdev
Thorsten Blum ea8b474b55 powerpc: use sysfs_emit{_at} in sysfs show functions
Replace sprintf() with sysfs_emit() and sysfs_emit_at() in sysfs show
functions, which are preferred for formatting sysfs output because they
provide safer bounds checking.

While the current code only emits strings that fit easily within
PAGE_SIZE, use sysfs_emit() and sysfs_emit_at() to follow secure coding
best practices.

This is a mechanical cleanup with a few simple edge cases:

- In domains_show(), drop the redundant n < 0 check since neither
  sprintf() nor sysfs_emit() return negative values.

- In powercap_show() and psr_show(), also drop the dead ret < 0 checks.

- In ps3_fw_version_show(), normalize the output by adding a terminating
  newline as suggested by checkpatch.

- In vio's modalias_show(), replace the deprecated strcpy() [1] followed
  by strlen() with sysfs_emit().

Leave validate_show() and the variable-length hv-gpci helpers unchanged
since they already have explicit bounds handling, and converting those
would be more than a mechanical conversion.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260524130002.793476-2-thorsten.blum@linux.dev
2026-06-02 11:24:32 +05:30
..
ge powerpc: Switch to irq_find_mapping() 2025-05-16 21:06:12 +02:00
xics Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
xive powerpc/xive: Add warning if target CPU not found 2026-06-02 11:24:32 +05:30
6xx-suspend.S
cpm_common.c powerpc/cpm2: Drop legacy-of-mm-gpiochip.h header 2025-09-06 16:05:26 +05:30
cpm_gpio.c
cpm2_pic.c powerpc: Switch to irq_find_mapping() 2025-05-16 21:06:12 +02:00
cpm2_pic.h
cpm2.c
dart_iommu.c powerpc/dart: Drop unnecessary call to kmemleak_no_scan() 2024-04-29 23:51:16 +10:00
dart.h
dcr-low.S
dcr.c powerpc: Remove DCR_MMIO and the DCR generic layer 2025-02-26 21:15:08 +05:30
ehv_pic.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
fsl_gtm.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
fsl_lbc.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
fsl_mpic_err.c
fsl_mpic_timer_wakeup.c powerpc: use sysfs_emit{_at} in sysfs show functions 2026-06-02 11:24:32 +05:30
fsl_msi.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
fsl_msi.h
fsl_pci.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
fsl_pci.h
fsl_pmc.c
fsl_rcpm.c
fsl_rio.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
fsl_rio.h
fsl_rmu.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
fsl_soc.c
fsl_soc.h
grackle.c
i8259.c powerpc: Switch to irq_domain_create_*() 2025-05-16 21:06:11 +02:00
indirect_pci.c
ipic.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
ipic.h
Kconfig powerpc: Replace CONFIG_4xx with CONFIG_44x 2024-06-28 22:28:48 +10:00
Makefile powerpc: Remove PPC_PMI and driver 2025-02-26 21:15:07 +05:30
mmio_nvram.c
mpc5xxx_clocks.c
mpic_msgr.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
mpic_msi.c
mpic_timer.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
mpic_u3msi.c
mpic.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
mpic.h
msi_bitmap.c mm/memblock: add memblock_alloc_or_panic interface 2025-01-25 20:22:38 -08:00
of_rtc.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
rtc_cmos_setup.c powerpc: add missing MODULE_DESCRIPTION() macros 2024-07-04 22:39:20 +10:00
tsi108_dev.c
tsi108_pci.c powerpc: Switch to irq_domain_create_*() 2025-05-16 21:06:11 +02:00
udbg_memcons.c