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mm/cma: drop CONFIG_CMA_DEBUG

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All pr_debug() prints in (mm/cma.c) could be enabled via standard Makefile
based method.  Besides cma_debug_show_areas() should always be called
during cma_alloc() failure path.  This seemingly redundant config,
CONFIG_CMA_DEBUG can be dropped without any problem.

[lukas.bulwahn@gmail.com: remove debug code to removed CONFIG_CMA_DEBUG]
  Link: https://lkml.kernel.org/r/20240207143825.986-1-lukas.bulwahn@gmail.com
Link: https://lkml.kernel.org/r/20240205031647.283510-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Anshuman Khandual 2024-02-05 08:46:47 +05:30 committed by Andrew Morton
parent be142b8080
commit fe58582c0e
3 changed files with 0 additions and 24 deletions
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6
kernel/dma/contiguous.c
View File

@ -37,12 +37,6 @@
#define pr_fmt(fmt) "cma: " fmt
#ifdef CONFIG_CMA_DEBUG
#ifndef DEBUG
# define DEBUG
#endif
#endif
#include <asm/page.h>
#include <linux/memblock.h>

9
mm/Kconfig
View File

@ -901,15 +901,6 @@ config CMA
If unsure, say "n".
config CMA_DEBUG
bool "CMA debug messages (DEVELOPMENT)"
depends on DEBUG_KERNEL && CMA
help
Turns on debug messages in CMA. This produces KERN_DEBUG
messages for every CMA call as well as various messages while
processing calls such as dma_alloc_from_contiguous().
This option does not affect warning and error messages.
config CMA_DEBUGFS
bool "CMA debugfs interface"
depends on CMA && DEBUG_FS

9
mm/cma.c
View File

@ -14,11 +14,6 @@
#define pr_fmt(fmt) "cma: " fmt
#ifdef CONFIG_CMA_DEBUG
#ifndef DEBUG
# define DEBUG
#endif
#endif
#define CREATE_TRACE_POINTS
#include <linux/memblock.h>
@ -387,7 +382,6 @@ int __init cma_declare_contiguous_nid(phys_addr_t base,
return ret;
}
#ifdef CONFIG_CMA_DEBUG
static void cma_debug_show_areas(struct cma *cma)
{
unsigned long next_zero_bit, next_set_bit, nr_zero;
@ -412,9 +406,6 @@ static void cma_debug_show_areas(struct cma *cma)
pr_cont("=> %lu free of %lu total pages\n", nr_total, cma->count);
spin_unlock_irq(&cma->lock);
}
#else
static inline void cma_debug_show_areas(struct cma *cma) { }
#endif
/**
* cma_alloc() - allocate pages from contiguous area