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| author |   Mark Rutland <mark.rutland@arm.com> | 2018-07-11 14:56:49 +0100 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2018-07-12 14:49:48 +0100 |
| commit | 80d63bc39f9ace9c1d2bef7f921d2f3ef2037d4b (patch) | |
| tree | a2777e911dc56541190485de76b2e0a53e2f9067 | |
| parent | arm64: zero GPRs upon entry from EL0 (diff) | |
| download | linux-dev-80d63bc39f9ace9c1d2bef7f921d2f3ef2037d4b.tar.xz linux-dev-80d63bc39f9ace9c1d2bef7f921d2f3ef2037d4b.zip | |
arm64: drop alignment from syscall tables
Our syscall tables are aligned to 4096 bytes, which allowed their
addresses to be generated with a single adrp in entry.S. This has the
unfortunate property of wasting space in .rodata for the necessary
padding.
Now that the address is generated by C code, we can rely on the compiler
to do the right thing, and drop the alignemnt.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| -rw-r--r-- | arch/arm64/kernel/sys.c | 6 | ||||
| -rw-r--r-- | arch/arm64/kernel/sys32.c | 6 |
2 files changed, 2 insertions, 10 deletions
diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c index 7f0907261269..df8180175515 100644 --- a/arch/arm64/kernel/sys.c +++ b/arch/arm64/kernel/sys.c @@ -56,11 +56,7 @@ asmlinkage long sys_rt_sigreturn(void); #undef __SYSCALL #define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)sym, -/* - * The sys_call_table array must be 4K aligned to be accessible from - * kernel/entry.S. - */ -const syscall_fn_t sys_call_table[__NR_syscalls] __aligned(4096) = { +const syscall_fn_t sys_call_table[__NR_syscalls] = { [0 ... __NR_syscalls - 1] = (syscall_fn_t)sys_ni_syscall, #include <asm/unistd.h> }; diff --git a/arch/arm64/kernel/sys32.c b/arch/arm64/kernel/sys32.c index d993214118aa..4ddeaae90128 100644 --- a/arch/arm64/kernel/sys32.c +++ b/arch/arm64/kernel/sys32.c @@ -44,11 +44,7 @@ asmlinkage long compat_sys_mmap2_wrapper(void); #undef __SYSCALL #define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)sym, -/* - * The sys_call_table array must be 4K aligned to be accessible from - * kernel/entry.S. - */ -const syscall_fn_t compat_sys_call_table[__NR_compat_syscalls] __aligned(4096) = { +const syscall_fn_t compat_sys_call_table[__NR_compat_syscalls] = { [0 ... __NR_compat_syscalls - 1] = (syscall_fn_t)sys_ni_syscall, #include <asm/unistd32.h> }; |