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linux/arch/riscv/mm
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Josephine Pfeiffer a74f038fa5 riscv: ptdump: use seq_puts() in pt_dump_seq_puts() macro 
The pt_dump_seq_puts() macro incorrectly uses seq_printf() instead of
seq_puts(). This is both a performance issue and conceptually wrong,
as the macro name suggests plain string output (puts) but the
implementation uses formatted output (printf).

The macro is used in ptdump.c:301 to output a newline character. Using
seq_printf() adds unnecessary overhead for format string parsing when
outputting this constant string.

This bug was introduced in commit 59c4da8640 ("riscv: Add support to
dump the kernel page tables") in 2020, which copied the implementation
pattern from other architectures that had the same bug.

Fixes: 59c4da8640 ("riscv: Add support to dump the kernel page tables")
Signed-off-by: Josephine Pfeiffer <hi@josie.lol>
Link: https://lore.kernel.org/r/20251018170451.3355496-1-hi@josie.lol
Signed-off-by: Paul Walmsley <pjw@kernel.org>
History 2025-10-27 11:40:43 -06:00
..
cache-ops.c riscv: split cache ops out of dma-noncoherent.c 2023-11-07 09:37:42 -08:00
cacheflush.c mm: introduce memdesc_flags_t 2025-09-13 16:55:07 -07:00
context.c riscv: Fix a comment typo in set_mm_asid() 2025-03-18 13:02:47 +00:00
dma-noncoherent.c dma-mapping: Simplify arch_setup_dma_ops() 2024-04-26 12:07:28 +02:00
extable.c riscv: select DCACHE_WORD_ACCESS for efficient unaligned access HW 2024-01-09 20:18:20 -08:00
fault.c riscv: mm: Add page fault trace points 2025-07-09 15:27:01 -04:00
hugetlbpage.c riscv: Fix hugetlb retrieval of number of ptes in case of !present pte 2025-04-01 07:03:03 +00:00
init.c Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
kasan_init.c kasan: call kasan_init_generic in kasan_init 2025-09-21 14:21:58 -07:00
Makefile mm: rename GENERIC_PTDUMP and PTDUMP_CORE 2025-03-17 00:05:32 -07:00
pageattr.c mm/pagewalk: split walk_page_range_novma() into kernel/user parts 2025-07-09 22:42:05 -07:00
pgtable.c riscv: Add support for PUD THP 2025-06-05 11:09:40 -07:00
physaddr.c riscv: mm: Don't use %pK through printk 2025-03-18 13:35:07 +00:00
pmem.c RISC-V: capitalise CMO op macros 2023-11-05 09:11:23 -08:00
ptdump.c riscv: ptdump: use seq_puts() in pt_dump_seq_puts() macro 2025-10-27 11:40:43 -06:00
tlbflush.c mm: remove arch_flush_tlb_batched_pending() arch helper 2025-07-24 19:12:32 -07:00