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[PATCH] uml: avoid malloc to sleep in atomic sections

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Ugly trick to help make malloc not sleeping - we can't do anything else.  But
this is not yet optimal, since spinlock don't trigger in_atomic() when
preemption is disabled.

Also, even if ugly, this was already used in one place, and was even more
bogus.  Fix it.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso
2006-01-18 17:42:58 -08:00
committed by Linus Torvalds
parent b6a2b13778
commit b63162939c
4 changed files with 19 additions and 11 deletions
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arch/um/os-Linux/helper.c
+2 -2
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@@ -60,7 +60,7 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
if((stack_out != NULL) && (*stack_out != 0))
stack = *stack_out;
else stack = alloc_stack(0, um_in_interrupt());
else stack = alloc_stack(0, __cant_sleep());
if(stack == 0)
return(-ENOMEM);
@@ -124,7 +124,7 @@ int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
unsigned long stack, sp;
int pid, status, err;
stack = alloc_stack(stack_order, um_in_interrupt());
stack = alloc_stack(stack_order, __cant_sleep());
if(stack == 0) return(-ENOMEM);
sp = stack + (page_size() << stack_order) - sizeof(void *);