diff options
| author | Andrey Abramov <st5pub@yandex.ru> | 2019-04-02 23:47:22 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-11 23:15:14 +1000 |
| commit | bac7ca7b985b72873bd4ac2553b13b5af5b1f08a (patch) | |
| tree | e38a430c68c40c29b0103f175d246b3092790401 | |
| parent | 2f62870ca5bc9d305f3c212192320c29e9dbdc54 (diff) | |
| download | linux-stable-bac7ca7b985b72873bd4ac2553b13b5af5b1f08a.tar.gz | |
powerpc: module_[32|64].c: replace swap function with built-in one
Replace relaswap with built-in one, because relaswap
does a simple byte to byte swap.
Since Spectre mitigations have made indirect function calls more
expensive, and the default simple byte copies swap is implemented
without them, an "optimized" custom swap function is now
a waste of time as well as code.
Signed-off-by: Andrey Abramov <st5pub@yandex.ru>
Reviewed-by: George Spelvin <lkml@sdf.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/994931554238042@iva8-b333b7f98ab0.qloud-c.yandex.net
| -rw-r--r-- | arch/powerpc/kernel/module_32.c | 17 | ||||
| -rw-r--r-- | arch/powerpc/kernel/module_64.c | 17 |
2 files changed, 2 insertions, 32 deletions
diff --git a/arch/powerpc/kernel/module_32.c b/arch/powerpc/kernel/module_32.c index d7134c614c16..c27b8687b82a 100644 --- a/arch/powerpc/kernel/module_32.c +++ b/arch/powerpc/kernel/module_32.c @@ -67,21 +67,6 @@ static int relacmp(const void *_x, const void *_y) return 0; } -static void relaswap(void *_x, void *_y, int size) -{ - uint32_t *x, *y, tmp; - int i; - - y = (uint32_t *)_x; - x = (uint32_t *)_y; - - for (i = 0; i < sizeof(Elf32_Rela) / sizeof(uint32_t); i++) { - tmp = x[i]; - x[i] = y[i]; - y[i] = tmp; - } -} - /* Get the potential trampolines size required of the init and non-init sections */ static unsigned long get_plt_size(const Elf32_Ehdr *hdr, @@ -118,7 +103,7 @@ static unsigned long get_plt_size(const Elf32_Ehdr *hdr, */ sort((void *)hdr + sechdrs[i].sh_offset, sechdrs[i].sh_size / sizeof(Elf32_Rela), - sizeof(Elf32_Rela), relacmp, relaswap); + sizeof(Elf32_Rela), relacmp, NULL); ret += count_relocs((void *)hdr + sechdrs[i].sh_offset, diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c index 007606a48fd9..f808159f3dfd 100644 --- a/arch/powerpc/kernel/module_64.c +++ b/arch/powerpc/kernel/module_64.c @@ -226,21 +226,6 @@ static int relacmp(const void *_x, const void *_y) return 0; } -static void relaswap(void *_x, void *_y, int size) -{ - uint64_t *x, *y, tmp; - int i; - - y = (uint64_t *)_x; - x = (uint64_t *)_y; - - for (i = 0; i < sizeof(Elf64_Rela) / sizeof(uint64_t); i++) { - tmp = x[i]; - x[i] = y[i]; - y[i] = tmp; - } -} - /* Get size of potential trampolines required. */ static unsigned long get_stubs_size(const Elf64_Ehdr *hdr, const Elf64_Shdr *sechdrs) @@ -264,7 +249,7 @@ static unsigned long get_stubs_size(const Elf64_Ehdr *hdr, */ sort((void *)sechdrs[i].sh_addr, sechdrs[i].sh_size / sizeof(Elf64_Rela), - sizeof(Elf64_Rela), relacmp, relaswap); + sizeof(Elf64_Rela), relacmp, NULL); relocs += count_relocs((void *)sechdrs[i].sh_addr, sechdrs[i].sh_size |