[PATCH v3 05/13] modules, execmem: drop module_alloc
From: Mike Rapoport <rppt@kernel.org>
Date: 2023-09-18 07:32:26
Also in:
bpf, linux-arm-kernel, linux-mips, linux-mm, linux-modules, linux-riscv, linux-s390, linux-trace-kernel, lkml, loongarch, netdev, sparclinux
Subsystem:
memory management, memory management - execmem, module support, the rest · Maintainers:
Andrew Morton, Mike Rapoport, Luis Chamberlain, Petr Pavlu, Daniel Gomez, Sami Tolvanen, Linus Torvalds
From: "Mike Rapoport (IBM)" <rppt@kernel.org> Define default parameters for address range for code allocations using the current values in module_alloc() and make execmem_text_alloc() use these defaults when an architecture does not supply its specific parameters. With this, execmem_text_alloc() implements memory allocation in a way compatible with module_alloc() and can be used as a replacement for module_alloc(). Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> --- include/linux/execmem.h | 8 ++++++++ include/linux/moduleloader.h | 12 ------------ kernel/module/main.c | 7 ------- mm/execmem.c | 12 ++++++++---- 4 files changed, 16 insertions(+), 23 deletions(-)
diff --git a/include/linux/execmem.h b/include/linux/execmem.h
index 806ad1a0088d..519bdfdca595 100644
--- a/include/linux/execmem.h
+++ b/include/linux/execmem.h@@ -4,6 +4,14 @@ #include <linux/types.h> +#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \ + !defined(CONFIG_KASAN_VMALLOC) +#include <linux/kasan.h> +#define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) +#else +#define MODULE_ALIGN PAGE_SIZE +#endif + /** * enum execmem_type - types of executable memory ranges *
diff --git a/include/linux/moduleloader.h b/include/linux/moduleloader.h
index a23718aa2f4d..8c81f389117d 100644
--- a/include/linux/moduleloader.h
+++ b/include/linux/moduleloader.h@@ -25,10 +25,6 @@ int module_frob_arch_sections(Elf_Ehdr *hdr, /* Additional bytes needed by arch in front of individual sections */ unsigned int arch_mod_section_prepend(struct module *mod, unsigned int section); -/* Allocator used for allocating struct module, core sections and init - sections. Returns NULL on failure. */ -void *module_alloc(unsigned long size); - /* Determines if the section name is an init section (that is only used during * module loading). */
@@ -118,12 +114,4 @@ void module_arch_cleanup(struct module *mod); /* Any cleanup before freeing mod->module_init */ void module_arch_freeing_init(struct module *mod); -#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \ - !defined(CONFIG_KASAN_VMALLOC) -#include <linux/kasan.h> -#define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) -#else -#define MODULE_ALIGN PAGE_SIZE -#endif - #endif
diff --git a/kernel/module/main.c b/kernel/module/main.c
index 4ec982cc943c..c4146bfcd0a7 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c@@ -1601,13 +1601,6 @@ static void free_modinfo(struct module *mod) } } -void * __weak module_alloc(unsigned long size) -{ - return __vmalloc_node_range(size, 1, VMALLOC_START, VMALLOC_END, - GFP_KERNEL, PAGE_KERNEL_EXEC, VM_FLUSH_RESET_PERMS, - NUMA_NO_NODE, __builtin_return_address(0)); -} - bool __weak module_init_section(const char *name) { return strstarts(name, ".init");
diff --git a/mm/execmem.c b/mm/execmem.c
index a8c2f44d0133..abcbd07e05ac 100644
--- a/mm/execmem.c
+++ b/mm/execmem.c@@ -55,9 +55,6 @@ static void *execmem_alloc(size_t size, struct execmem_range *range) void *execmem_text_alloc(enum execmem_type type, size_t size) { - if (!execmem_params.ranges[type].start) - return module_alloc(size); - return execmem_alloc(size, &execmem_params.ranges[type]); }
@@ -111,8 +108,15 @@ void __init execmem_init(void) { struct execmem_params *p = execmem_arch_params(); - if (!p) + if (!p) { + p = &execmem_params; + p->ranges[EXECMEM_DEFAULT].start = VMALLOC_START; + p->ranges[EXECMEM_DEFAULT].end = VMALLOC_END; + p->ranges[EXECMEM_DEFAULT].pgprot = PAGE_KERNEL_EXEC; + p->ranges[EXECMEM_DEFAULT].alignment = 1; + return; + } if (!execmem_validate_params(p)) return;
--
2.39.2