github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 01:32:21 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

riscv: mm: Make mark_new_valid_map() stuff depend on 64BIT && MMU

Browse Source 
None of the code relating to mark_new_valid_map() does anything useful
without CONFIG_64BIT=y && CONFIG_MMU=y, because the
new_valid_map_cpus_check code is only used if CONFIG_64BIT, and the
exception codes checked there can only happen with CONFIG_MMU=y.

Therefore, make these conditional on CONFIG_64BIT=y && CONFIG_MMU=y to
simplify programming, since we do not have to handle CONFIG_MMU=n when
changing this code in the future. This also removes some unused code on
the entry path for CONFIG_MMU=n.

Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn>
Link: https://patch.msgid.link/20260713-mark-after-vmemmap-populate-v6-1-b945ceba29d4@iscas.ac.cn
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Vivian Wang 2026-07-13 11:29:52 -06:00 committed by Paul Walmsley
parent a13c140cc2
commit b6ea9680f8
3 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/riscv/include/asm/cacheflush.h
View File

@ -40,7 +40,7 @@ do { \
flush_icache_mm(vma->vm_mm, 0); \
} while (0)
#ifdef CONFIG_64BIT
#if defined(CONFIG_64BIT) && defined(CONFIG_MMU)
/* This is accessed in assembly code. cpumask_var_t would be too complex. */
extern DECLARE_BITMAP(new_valid_map_cpus, NR_CPUS);
extern char _end[];

2
arch/riscv/kernel/entry.S
View File

@ -137,7 +137,7 @@ SYM_CODE_START(handle_exception)
.Lrestore_kernel_tpsp:
csrr tp, CSR_SCRATCH
#ifdef CONFIG_64BIT
#if defined(CONFIG_64BIT) && defined(CONFIG_MMU)
/*
* The RISC-V kernel does not flush TLBs on all CPUS after each new
* vmalloc mapping or kfence_unprotect(), which may result in

2
arch/riscv/mm/init.c
View File

@ -37,7 +37,9 @@
#include "../kernel/head.h"
#if defined(CONFIG_64BIT) && defined(CONFIG_MMU)
DECLARE_BITMAP(new_valid_map_cpus, NR_CPUS);
#endif
struct kernel_mapping kernel_map __ro_after_init;
EXPORT_SYMBOL(kernel_map);