Josephine Pfeiffer c849e6941f riscv: ptdump: use seq_puts() in pt_dump_seq_puts() macro ...

[ Upstream commit a74f038fa5 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-11-13 15:34:36 -05:00

..

cache-ops.c

…

cacheflush.c

riscv: add a data fence for CMODX in the kernel mode

2025-07-06 11:01:35 +02:00

context.c

…

dma-noncoherent.c

…

extable.c

…

fault.c

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hugetlbpage.c

riscv: Fix hugetlb retrieval of number of ptes in case of !present pte

2025-04-10 14:39:32 +02:00

init.c

…

kasan_init.c

…

Makefile

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pageattr.c

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pgtable.c

…

physaddr.c

…

pmem.c

…

ptdump.c

riscv: ptdump: use seq_puts() in pt_dump_seq_puts() macro

2025-11-13 15:34:36 -05:00

tlbflush.c

riscv: Call secondary mmu notifier when flushing the tlb

2025-05-29 11:02:14 +02:00