Messages in this thread Patch in this message | | | Date | Fri, 19 Apr 2019 23:03:43 +0300 | From | Alexey Dobriyan <> | Subject | [PATCH -mm] elf: init pt_regs pointer later |
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Get "current_pt_regs" pointer right before usage.
Space savings on x86_64:
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-180 (-180) Function old new delta load_elf_binary 5806 5626 -180 !!!
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> ---
fs/binfmt_elf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -704,12 +704,12 @@ static int load_elf_binary(struct linux_binprm *bprm) unsigned long start_code, end_code, start_data, end_data; unsigned long reloc_func_desc __maybe_unused = 0; int executable_stack = EXSTACK_DEFAULT; - struct pt_regs *regs = current_pt_regs(); struct { struct elfhdr elf_ex; struct elfhdr interp_elf_ex; } *loc; struct arch_elf_state arch_state = INIT_ARCH_ELF_STATE; + struct pt_regs *regs; loc = kmalloc(sizeof(*loc), GFP_KERNEL); if (!loc) { @@ -1159,6 +1159,7 @@ static int load_elf_binary(struct linux_binprm *bprm) MAP_FIXED | MAP_PRIVATE, 0); } + regs = current_pt_regs(); #ifdef ELF_PLAT_INIT /* * The ABI may specify that certain registers be set up in special
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