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jump_label: move 'asm goto' support test to Kconfig

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Currently, CONFIG_JUMP_LABEL just means "I _want_ to use jump label".

The jump label is controlled by HAVE_JUMP_LABEL, which is defined
like this:

  #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
  # define HAVE_JUMP_LABEL
  #endif

We can improve this by testing 'asm goto' support in Kconfig, then
make JUMP_LABEL depend on CC_HAS_ASM_GOTO.

Ugly #ifdef HAVE_JUMP_LABEL will go away, and CONFIG_JUMP_LABEL will
match to the real kernel capability.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
This commit is contained in:
Masahiro Yamada 2018-12-31 00:14:15 +09:00
parent 72d3ebb929
commit e9666d10a5
42 changed files with 65 additions and 119 deletions
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6
net/core/dev.c
View file

@ -1821,7 +1821,7 @@ EXPORT_SYMBOL_GPL(net_dec_egress_queue);
#endif
static DEFINE_STATIC_KEY_FALSE(netstamp_needed_key);
#ifdef HAVE_JUMP_LABEL
#ifdef CONFIG_JUMP_LABEL
static atomic_t netstamp_needed_deferred;
static atomic_t netstamp_wanted;
static void netstamp_clear(struct work_struct *work)
@ -1840,7 +1840,7 @@ static DECLARE_WORK(netstamp_work, netstamp_clear);
void net_enable_timestamp(void)
{
#ifdef HAVE_JUMP_LABEL
#ifdef CONFIG_JUMP_LABEL
int wanted;
while (1) {
@ -1860,7 +1860,7 @@ EXPORT_SYMBOL(net_enable_timestamp);
void net_disable_timestamp(void)
{
#ifdef HAVE_JUMP_LABEL
#ifdef CONFIG_JUMP_LABEL
int wanted;
while (1) {