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RISC-V: Use a less ugly workaround for unused variable warnings

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Thanks to Christoph Hellwig for pointing out a cleaner way to do this,
as my approach was quite ugly.

CC: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Palmer Dabbelt 2018-08-28 09:37:16 -07:00
parent 0ce5671c44
commit 47d80a68f1
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GPG Key ID: EF4CA1502CCBAB41
1 changed files with 1 additions and 14 deletions
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15
arch/riscv/kernel/sys_riscv.c
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@ -65,24 +65,11 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
SYSCALL_DEFINE3(riscv_flush_icache, uintptr_t, start, uintptr_t, end,
uintptr_t, flags)
{
#ifdef CONFIG_SMP
struct mm_struct *mm = current->mm;
bool local = (flags & SYS_RISCV_FLUSH_ICACHE_LOCAL) != 0;
#endif
/* Check the reserved flags. */
if (unlikely(flags & ~SYS_RISCV_FLUSH_ICACHE_ALL))
return -EINVAL;
/*
* Without CONFIG_SMP flush_icache_mm is a just a flush_icache_all(),
* which generates unused variable warnings all over this function.
*/
#ifdef CONFIG_SMP
flush_icache_mm(mm, local);
#else
flush_icache_all();
#endif
flush_icache_mm(current->mm, flags & SYS_RISCV_FLUSH_ICACHE_LOCAL);
return 0;
}